PHÂN TÍCH POL MÍA VÀ CHỮ ĐƯỜNG CỦA MÍA

Bo co th
BO CO THC TP TT NGHIP
TÊN BO CO
PHÂN TCH POL MA V CH ĐƯNG CA MA
MỞ ĐẦU
 !"#$$"%$&'()*+,-$./
01234536789:;<3:13=>?@A>1
3?B>13?B:;<CD6.E13F1>13?BG3:1H3?BG3:1
IJG.80B;<K>?
=K>?PHÂN TCH POL MA V CH ĐƯNG
CA MA23536780.03<::./01
SVTH: Cao Văn ThL 1
Bo co th
CHƯƠNG I: GIỚI THIU V# ĐƠN V$ THC TP
"GIỚI THIU
VIN NGHIÊN CỨU MA ĐƯNG
SUGARCANE RESEARCH INSTITUTE (SRI)
+BMN4OG71I;&:GMI5

+PQRPSRQTTTUVWBJPQRPSRQTTQUV
X3B.823BC7Y1B3
Z2<[2\\]]]823BC78G\\[8BB[8
$L7)?B+A^_"`0.2a71;[
bb\a+cI$$c&&I01dQ:Pde3TPdTfBIghIg$ 
80:6$  G=.[i5080:6SRe3^djUUc
TPdT`G8k97lm:B7!3$L7&>1)?B^djUUcdjbT`G
$L7)?B+AI;&:^djbTcTPPR`807>3$L780
:6)?B+A^TPPRcTPdT`
II. Chức năng, nhiệm vụ:
c.0nL[mBl .G=LeL7mB
l80716B G:o7;G8EC8pG380

[qJ7E893?BA!38qkp8po7q.r$0kfBIg
$ 80:6  
SVTH: Cao Văn ThL 2
Bo co th
cN>1C;.G5GC:Gm;!L7mBl80
716B .s83?BA5E=t3o719
C7180nL2o71fB:.7
c$L79J7EGJ>1C:77tGo717tGo715Go71!3G
3Lm;Gmu7p8po7q.r$0k893?BA
cL7<q=kGL7LCp80
L76mB893?BA
c8EGC8p80716B G :m71; 
7g.s83?BA
cB3B0!G<vCw7v>.80J>1C3! 
[hC@.789xBl& 3?BA
cCBG.m;89L7mBlG0!G716B G
71BGmq3Gi3mu73k7g!38Le
fB8k:nLG:>800k2o71fB:
.7
cnLmCBGJ7Emt7Gmt7G;<G:Ep8p
L7mBl893?BA7g!38LeG38pfB
2Oo71fB:.7
ca7q.rG[iCp<;G8LG LG7v>.Gm?G0
[q80:7v.m:B2o71fB:.7
c:38pm:C:3xBl$ 
$B380E=t3o719B
III. Nguồn nhân lực
n[&Ic&$QTAG==yGjGTS+!lGdTx80
dy[E80 >mu7
&E7nL

SK713 8pGRIg3 L7Gd!380
[qJ7EGT+87g
SVTH: Cao Văn ThL 3
Bo co th
c7>3.B!3?B
+\J4+!_KG71+GM>3+v
c7>38E80&716B;<gmu7)?B+A
+\dUT\SG$71zE0GdSGayGv&?)
IV. Những thành tựu chính:
c0o7s22&=dPPP=7v.B!kk
0<qo7q
c3?B +4716l80B80[qJ7E973?B
3kGB;3UP{nC?v3?Bh$B3G=
=PQ3?B$C.B! v3$bycydSUG$byc
yTTG$bycTQddG$bycdjQG$bRcdyTUG$bRcdbRjVdP3?B 
?LVTR3?B [qJ7Ei
c& ;<gmu7a715>B3?B[!<SB
!VPy;<gmu789o715[qJ7E3?B!:8D>1
$71G$B37<gG+ $B3<g80>1$B3<gVPS;<gmu789
<:[iCp7|}80K|[>7!>13?Bh:M
7m78+ $B3<gVI:<=><4<DC!B3p80
7;t3><=.:xc73B2>13?B!397V80I
:[iCp7|}807>o7B.:>13?B8D>1$71
c4~hI•m2fBfk&?f2a71;
[dQPb\a+c01TQ:dde3TPPUG4=0? 
:G=/80[J>1C&fsBJ4g80<q8no7
:o7;
c+4:GBn0e3o7BGBnG8.7.B~mu7
8kPjkv3?B;k^&7<BG)uG€G:G7a7G:
SVTH: Cao Văn ThL 4

Bo co th
BG•+gG"BoG.2`
c:o7;[893?BA@B$B38kBk"Bo
80&7<B
CHƯƠNG II. NHNG VẤN Đ# KHI QUT
I.Đ$NH NGHĨA MỘT S DANH TỪ-THUT NG THƯNG DÙNG
dMía:$71.7CD6[qJ7EAG3?B7B806?GHv3=
3?B7/80:!EfB3?B
TTạp chất của míav3.:Gl3?BGzGE:
SBã mía0/Em x Bk[B7m?H.E1k
3?B>13?B
yBã nhiễm0@!E}Gv3@[2 7.‚2Eƒ[B
o7:~G:80:Hk3?B>13?B
RPhần xơ mía&Em m KBBk•3nL>13?B
23[8k>13?B2{
0/A3?B0M.{A>13?B
QChất khô&EƒKBBm <B1J:<•IJm;~
SVTH: Cao Văn ThL 5
Bo co th
;o7Bm;
UBx;ƒfB@IJGIJ<67l.<67m;fBEƒKB
BdPP/e3l.C7CAB<•Dm;B1M
lm;
bPol;ƒfB@.B322G.0<67l.<67m;fB
[BB.‚dPP/e3l.ACm;o7q<•
3:1.B32d./277to7;
jThành phần saccarozo0.!.7J= L>i&
dT

TT

„
dd
.0
3g.!C[BBG;7Ck:CpfB3gBJ~2‚35=6f1
>0.7‚80…7‚00/f1;7=>13?B80f
qA
dP;ƒfB@B271<67gm;qfB
C7CA&K=sB./M.{fB[BB‚0/Eƒ
KBBC7CA8k
.+J:;d./3:1>.B32
IJ+J:<•I~IB732m;
&= L.0†‡dPP
dd;ƒfB|B8171sB.0<67gm;q
fBC7CAGB1.0.l.fB[BB‚0<gl
.EƒKBB
&= L.0†‡dPP
dTSacc+J:<•:>B.03:1.B32
IJ&EƒKBBJ:•;o7B
SVTH: Cao Văn ThL 6
Bo co th
dSĐường mía  0  3g  C[BB    !  0  <h  ˆcc.7…7B‚B
80‰cc…7…7B‚B
dy Đường khử còn kí hiệu là RS;ƒfB@_2C77B[2
:o71J:EmiC7CA
.7‚80…7‚
dRĐường nguyên liệuEq:.!AB80[qJ7E6B G
;.!=t3EB
dQĐương thô&=l;_B][7BG.0.!A71.7
8k03:1.71G.0A=630780GBo7B[E1m G
A=.†jQcjb{

dUĐường tinh luyệnAl.0_X8;ƒfB@_2…2CXJBa7B.1G
.0A[qJ7E|A71.7GA ŠŠ8kt3EB
.‹jjb{Ggt3‹PPy{
dbĐường kính trắngAl.0_8;ƒfB@_2…2CBCBC
a7B.1.0A[qJ7E;|71.73?B>1GA=
t3EE_X
djNước mía nguyên0k3?BHB|>13?BB=Bg8k
kGk3?BHB/7fB>13?B
TPNước thẩm thấu (Imbibition):0k3?B=gE780
<4B1[B7mBm}3HG~3:1m71;:6.03.4v
gA<03?BKBBB8kkGv;pH~m71;:
•3e7[7EH
TdHệ thống thẩm thấu0<Bv3:7vk80k3?BG7.<4
~7.:<7vm71;:KBg6.03.4vg<4
o7:5H97./G~97em71;:G•3?B
k3?B3?B
TTpH:+6J:3 AfBC7C
&= L†c.^
Œ
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SVTH: Cao Văn ThL 7
Bo co th
†U.03 A7?
•U.03 A<B‚
ŽU.03 ABJ
TSNước mía trung hòa $k3?Bo7B::>=Bl8 
&B^„`
T
G
T

„
S
G
T
&„
S
Š80qL=Bl;0!B:m;
fB
TyNước mía kiềm hóa0k3?B4Bg8k[@B8 &B^„`
T
6
>gfBk3?B.B
TRCột sulfit hóa|.K.77•30[Bm?„
T
803g;<
;JO8kk3?B
TQHiệu suất épl.A[BB‚k3?B•[8k
l.A3?B?2/e3&:?
7[7EH†‡dPP
~
‡dPP
TUHiệu suất ép hiệu chỉnh503.J3?BBB1E=q
h;7[7EH+6=6[[:7o7q.038hC0H3?BfB
:03:1m:B7Go7;4o71.E1J3?B.0dTR{6[
[:Gl.07[7EH7M
&= L?.0
X
dTR
†
=

X
dTR
7[7E7M
X7[7EH
W{[3?B
Tb7[7E;.71^&`/A;.71L.0l.
AfBA0t3[8kl.Ak3?B•
SVTH: Cao Văn ThL 8
Bo co th
^{`<Bv3q<:;t3=6;<;0A0t3$=<67
o7:5;.71Ak3?B;7v<B
7A^{`
k L?
&†‡dPP
Tj7[7E;.717M5gm;^`fB71.7;
.71BB1E=qh;7[7E7v;.71+6=6[
[:7o7q;.71a7;4o71gm;fB;.71_†
bR{.03[h?:
7[7E;.717M?2 L
_
bR
†‡dPP
3

†
=
_
bR
7[7E;.717M
3

8
+gm;372.r71;
‘+gm;fBk3?B•
_7[7E;.71
SPHiệu suất tổng thu hồil.A0t3[8kl.
A3?B$=<670<go7:5[qJ7E/A7
;|A3?B?2 L.0
7[7En7v†
SdHiệu suất tổng thu hồi hiệu chỉnh:(HSTTHHC`
&= L.0
HSTTHHC†^{`
STHiệu suất sản xuất đường
SVTH: Cao Văn ThL 9
Bo co th
Al.07[7EA3?BG8krsBm;<B7E7
.75.03BdE0t3B23l.A0t3[
8kl.3?B^{`
k O?
7[7E[:J7EA†‡dPP
SSChữ đường0M[{A3?B3!CD637B
3?BGAm?7&&8;ƒfB@332B.B2[7B& L
3fB7[B.B[iCp|e3dbjj!K?3
a722[BC
&= L?.0
&&†^d’`c^dc`
=
†.k3?B/7
I†IJk3?B/7
W†J3?B^{`
SVTH: Cao Văn ThL 10

Bo co th
CHƯƠNG III: ĐỨC TNH CẦN CÓ CA KỸ THUT VIÊN KIỂM
NGHIM.
AN TON V BẢO HỘ LAO ĐỘNG TRONG PHÒNG HÓA
NGHIM.
I. ĐỨC TNH CẦN CÓ CA KỸ THUT VIÊN KIỂM NGHIM
& :m63303:1AABA8?B
3ƒfB0o7q.r
&m6338“A.03 :o7q.rK
q
•  9Gq=<•ELM0!
• &=/:3G0807
• &t80?J:G.7 .7 7hB:>?
“m?:
• q=rLeƒ80l0
• AJ71<qq3??J:80mA3g:Oo71580
:;73g
@L?E1GAmu78[”7E[.7;7?J:
B;3gm;.7[B.[G>1.7o7qm=.AGk;.0
>1!;!:[qJ7E80q: G3E
71?8km:0
• +~<.0:03:1A3?BGA.7197q37BfB C>G=
03:1=3o7B37B<:8k08! C><:3?BG<:A
SVTH: Cao Văn ThL 11
Bo co th
 71.7G:fB0=B=97o7Bm63t3E$;7;7
?780?J:=6>1B<<:~<37B
)7=L?=:71A50;m;G$0o7q.rG
.4!J?“q!97mK>?q:3:G
:v0G7gG8[ GB</1fCppG3:1

3=8.rG:.!>?J:G~<.0@8?.E13F76>
?qq3<q?AJ71.pq780=?!<67
B
II. VẤN Đ# AN TON V BẢO V LAO ĐỘNG.
$017/7??J:Gmu78qq3<qB0CppG
3:13=;<B<KGB> [iCp5q
B!o715B:Gm[iCp:=BEqlmu4
7G<;•71.r~?fB|.!=BE
• +8k@ECz<ƒ:1G5m Cp.iBl~6/@
Em?<B1BCz<ƒ.iB
• A<:1m qG<5sC~ƒB1G<•!1;3
m?C~<•:e~C<•:Š$22GJeG<2‚2GB21.2G
m Bk.!–k[”n.3~k5m 6CD
k6C~ƒG|EBGmB.Gm3.!Šm~k[”[
CCz:1G;7CDk50e[:1
• x;JO8k:BJ80<B‚3!Gt:8784B0G9
K<ƒ803ƒGB1>G:o7/<BA“BJB1<B‚80k
mB.4m nk80BJB1<B‚x OBJB1<B‚
<•2G30CD2=</7>m ABJ3C~nB
5q8Kk6.03.0BB1
• ABJ>3~nB>B15qCg@B97kB180
[B7=CDC7C$BB<Bd{B1k[iB8 .4G;7<<}
<•<B‚3!5“@BB1<•k97./80[B7=CDBJ
B2d{6iB;
SVTH: Cao Văn ThL 12
Bo co th
• A<<ƒ803ƒ5!>•3B1.A80CD8K
kiB.p~CDC7C$B&.d{6iB;G1< <e[!
807B<>;<8
• A<7803G~480;C!C01;7.0BJ5!

>JO3G~797<•k:=LB)„$;7.0<B‚5
“JO3G~7k.!=LBBJB2d{x 
CD7.03 
• x.0388kEg
• &:=BEgCDK=B3qo7q.r~”GM
=hK;E:[.217/7GJ8q7
vG  =  m    80  h  K  @  5B  m=B
&Eg01JqB;B18080.l=m?7—
7163˜G˜;A˜ŠmOEgql
• A<gg5 3!BG0B0G.KL
ƒ
• x>?:;<=7v5qm C:[![”A
A<!5AJ7o7B.L:/75G~ƒ/7
CBG~CD3g8m CF6. !>BG[B7=.03 E
>!B1;7E1!><E
• x.0388k:<;.03<•B[x3hm=B.0q>3.iBB1G
CDJqm=B8BB0.!m 6B[[5hG.B0
KGm=.@B[”:1qK
• x>?:EgGE=3Dq3h.KOB0G~CD
o7!t1Bm}KGE=O<B1.B
III. TC PHONG CẦN CÓ:
m;0?3m A8GAJ712
C•@m:AG@:[0r37
• km7t<>?q7go715~ql.!ƒ3•17
/7G3p?fB!3p/>?G7t<80m63Bg1Gg
?J:Gg><•fB3:13=GCpp.o7B/>?GCp
“>?q[![”Gm :G;7/q[:Dx63B=BE[i
SVTH: Cao Văn ThL 13
Bo co th
CpJ23=<;nG;7/qm63B.!?Evg

fBC7C7t
• q7t<3F7~[n[:G<O36H
• qƒ38@?E=B.rfB|.!E6B;80<qo7q
G=@=BECz>f1<h:[:5q80.l30780E
@G=@.!Cz<>f1GC663[ ECz<B15
<qo7q3:3™GK.!::1Gn
• $@Cpp>?/97.0f1q:o7B=G.!g
gC!8w
x>?m .E1CppB>?fBAm:6m 
qh; 8fBl
SVTH: Cao Văn ThL 14
Bo co th
CHƯƠNG IV: PHƯƠNG PHP LẤY MẪU V XỬ LÝ MẪU
I.NGUYÊN TẮC CHUNG
a7:580m633.0•33p?[:77tE
.G0/80t3EfB|.!8EC>1719[q
J7E“:8EB3B
+8ko7:5[qJ7EA3?BG|m>771.7?^3?B8k
03:1A3?BGA GAm;8k03:1A
.71`;m>7[i.rk3?B[!G;m>7<:;t3vB
;0t3C@@m;mJ7EBAG|m>7G|
 !;<;97=@M7 [ms7K}q?
J:80mAO :o7q.rmu7Go7t.r[qJ7E3B.!
7o7qm;B80!71?fB0[qJ7E8km:0
137=m;o7q>?q:?780?J:5
k;Gq=:.E13F7G2:71ƒ[B7>1
1. Iqq3?E!C8k. 03?B>1GA0t3Š
.E1h978?m:B7GF17<67
2. Iqq3?!C8k. 0g5.E13F7.pGvEGm 
.E13F7p<g

3. .3F7/f6>?G?E.0f3F76>?.!B./m
A~p~o7:5>?
4. x.E13F76B80>?G3F7q[i.r[<g<•:
g97B GB[3F767D/K.!8|Bf[.
17/7>?G8|Bf!C3F7
+8k:3F7E.}80.E1.pG5m.E13F7qm7E1g
97G[B7=@.!3g[./;>?GK.!n80C>1
719G:.4?3F7
5. $@Cpp.E13F7GLB3F7q[![”G.32808 D•
@=BE?
6. )•3F7q=m2/1f01A.E13F7G34[3F7Gm 
/3.FG=[n>?H<B/7GmrA>?Š
SVTH: Cao Văn ThL 15
Bo co th
II.PHƯƠNG PHP LẤY MẪU CHO TỪNG HẠNG MỤC PHÂN TCH.
 +!<g:03:1AfBkBB1GEm71;89
:.E13F7m o7B>3m.C:Go7:57E
;<G;m;G;!“m f/717/7|=:8?80
;<m =~=30m ?G;m;[qJ7E17/7
50o7t.r3k.ƒ~m v<g80;7?J:
$!|3g[03:13kG!5;m;0M
B7>1.03g[:<q17/7|.!3F7
1. :.E13F73?B>1!7g3?B6i@AGig?
fB3?Bkm80[qJ7E
a) &>8=B3;7g3?B30B/m63BlcQ8?
F7><mq:977g3?BG3•8?~dcT
>1G~3B80!l;—53~e˜G<=.!G3B89K
>?
)g<=3?B=|QcdT>1^3F70975?!C0B`
$;73F7.0dT>1GB>13?B0S!G>80lBl

3giB[.<•:&>101.E1/>G>1mB.E1/l80
>1m:.E1/G[.3giB=B.!23=[![”z80.:G
v23>G=m.3F7|RcQmG>l.&>m.!
EA30B8|B=[!=G6J:M.!E>13?BG
[.3?B4=[!23HG6.E13F7k3?B80<423
>?GAE1E1m.3F7.ko7:m /;5B
232 :!3?B4.03[!6.E1m.K.!3g@B
k.E1|iBfB|!3gB7=23>80.E13F723
>?
b) :.E13F76m63B[<gg?fB3?B<•2…B322/3
B1B“l8?803•>13?BB?S/G>80
l6=gIJ<5o7>Bo719?J:89m;.7g?fB
3?B
SVTH: Cao Văn ThL 16
Bo co th
2. PHƯƠNG PHP LẤY MẪU MA CÂY TẠI BN CÂN NH MY
HOẶC TẠI XE VN CHUYỂN MA HAY TẠI BÃI CHỨA MA
B1:03:1AhkB9737B3?BE. o7B
m;o7q>?@A=>13?B$:Cp::
.E13F7m:B7
BE13?B|k3?B71fB<g2H/7G:CE7.0:<•
Cq8 <g./3?BfBA<:G6><3?BfBf018k3?B
fBfm:Gk3?B3F7?3gACF;<g>
?m9328k3g?76m6338.E13F7|f3?B
<
:.E13F701=?!CBG;7 :nL
m63[:G [7E03:17g.!8|B80[.3?BfB|f
3?B.kTPcSPEh.3g. .E13F7
:01m ?G8kf3?B=[q.}|RcdP
E3?B3•. 0/.E13F7G~<.0m=.0m :;

3?BB80[qJ7Em .p30q.7.!h<4LB
<E13F7|3?B>18716;<:3?B03:1
km>J:.
2o71fB!B[:03:1.E13F7i@AG<•
:OQ>13?BQ8?F7m:B78
716G<•q3o7B3B?!CqJ23?BG=/1fq;
lfB>13?BG:B.fBA<:3?B7t
<>13F1;G v3ƒ~8km63B8<•:
=CE77M•OQ>13?B<=~.!mš32m34
[3F78071689<gH.E1k3?B>?)F7k3?B
.l[<g80q/3.F34[fB3F7
+>1.0:.E13F7=97638kQ>13?Bm 6!
C0p0>1GBq=;:[7m:
3. PHƯƠNG PHP LẤY MẪU MA XÉ TƠ TRƯỚC KHI ÉP
SVTH: Cao Văn ThL 17
Bo co th
)g[03:1A3?BfB7[B.B=:.E13F7m:
q“m:!CB7m3?Bo7BCB<e380o7B<O:G
km80<gHCAB;m;3g<g=3gACF3F7
J73gJ LB3F7GJ 3F701==BE[:DW3.
BC280=1ƒm?G3•f3?B=3gJ 3F7Gmš32m34
[G[B7=B80<g>?GH.E1k3?B6?@A
) q!MfB<eq3?B[B7m3?B4o7B<g:k
mJ7<g2H/7
SVTH: Cao Văn ThL 18
Bo co th
(1) Ieq
(2) ):CF3?BJ7<g2H/7
(3) &:iB=3h6.E13F73?BAd<g1.c[
(4) Ig&1.c[6716g=3hiB.E13F7GmH<•

3gg8023g7m•E
(5) &:B1o7B16!.>13F7
(6) &:B1o7B16!.E13F7|BB803:J7<g2H/7
(7) $LB3F7=<gJko7B16!3?B3F7|BB803:CF
J7<g2H/7
:01“.E13F73?B!MfB<eq ^d`G
sB.0[B7<OB:80k<g2H/7M=m;E7m?6.E1
3F7=m:CD71g1.c[6t1E3<q.9!3?B[B8
?.E13F7G80CDE3!<q.9=!.9<•3g716g1.c
[6!3?B3F7|B803:3?BL^T`J7<g2H/7
SVTH: Cao Văn ThL 19
Bo co th
B73•7/G3B89<g>?H.E1k3?B80<4Gk3?B
3F7Ji.r6.GgIJG80;7/J:0/JfB
3?B_v.E1m;o7qG:Cp L?@A^&&`
:01m:!CGm63[:.3?B
fB|A<:q~”Gm 63?BfBf01.F8k3?BfBf
mBq.7E0.k5:.E13F70?J:80
7
4.PHƯƠNG PHP LẤY MẪU MA BẰNG H THNG DN KHOAN
Từ vụ sản xuất mía đường 1996-1997 ở nước ta,một số nhà máy bắt đầu
trang bị các thiết bị lấy mẫu ằng dàn khoan.
SVTH: Cao Văn ThL 20
Bo co th
BmB
_ED8k03:18716dPP{<•:
A<gGJ23?Bkm80>Go7BCkC0mB$A970C?
3“mB6J71|.k3?BJ7:1DJ2c[B7=OmB.!80
f1.t13F780DJB18p807163F701D8k
SVTH: Cao Văn ThL 21

Bo co th
m30[fBf3?BB89>?
<0mB.7g^B[iCphq_H7c:c80I7<
>1$`
IgC0mB~3g/73:1mH^B27`G.716g
mB.0 [7EfB/73:1mHxJ287163?Bkm80>G
A.E13F797m63E1mH=ƒ3“mBGC?mB80@iB
[n=T<DJ2GJ71[7|080+>1.03g.!J271
CDGA3h@iB[n5K=AK.kdGR./[8k
3“mB^5""c""cQ`$q3F7B•[803g<BLBmš3
2m34[A<:3?BG716;<g>?
:01=763:G8|B.!G.!
8|BE!CG<h85mB|RcQ8?><BJ23?BM/.:
B27Cg30m /J287163?BJ2C8?
B7m3F73?B.E1B|3“mBGABB80JB180H.E1k3?BG
806>?@A::>?4=
:.E13F7<•3“mB8ke..E1|/73:1mHG
8F!3p?.03F7!C80:0 ”E97./[
8kC0mB
SVTH: Cao Văn ThL 22
Bo co th
5""c""cR3:1mHƒ3“mB.E13F73?DJ2
SVTH: Cao Văn ThL 23
Bo co th
5""c""cQ!J287163?B71CD=niB[n5K6
B3“mB80.E13F7
R,›$œ••)ž(&œ&„Ÿ"$, &)*
¡ !cHk3?B/.E13F7:.!k3?B
71^k3?B/7`Gk3?B•Gk3?B780<43?B
+6=3F7O80?J:GqeL80kt3E7fB

 ! 01$0 3?BAhkBB[i
Cp: t3E7[B7>1
Rdt3E7mH
Rddt3E7mHy<gH^[v5""c""cU`
SVTH: Cao Văn ThL 24
Bo co th
$k3?BHfB3:1["Œ"".0k3?B•c$k3?BH
fB3:1["""<3t3E73E1H[""
$k3?BHBfB3:1["<3t3E73:1H["""$kt3
E73:1["
SVTH: Cao Văn ThL 25