Ch\u1ea5t \u0111\u1ed9n kho\u00e1ng phi kim lo\u1ea1i th\u01b0\u1eddng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c v\u1eadt li\u1ec7u kho\u00e1ng phi kim lo\u1ea1i t\u1ed3n t\u1ea1i trong t\u1ef1 nhi\u00ean v\u00e0 \u0111\u01b0\u1ee3c khai th\u00e1c, x\u1eed l\u00fd v\u00e0 s\u1eed d\u1ee5ng nh\u00e2n t\u1ea1o \u0111\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 b\u1ec1n v\u00e0 c\u00e1c \u0111\u1eb7c t\u00ednh kh\u00e1c nhau, ho\u1eb7c \u0111\u1ec3 gi\u1ea3m gi\u00e1 th\u00e0nh v\u00e0 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o ch\u1ea5t d\u1ebbo.<\/p>\n
Ch\u1ea5t \u0111\u1ed9n kho\u00e1ng phi kim lo\u1ea1i \u0111\u01b0\u1ee3c chia th\u00e0nh: oxit, hydroxit, cacbonat, (sulfit), silicat, cacbon, v.v … C\u00e1c oxit ch\u1ee7 y\u1ebfu bao g\u1ed3m: silic \u0111i\u00f4x\u00edt, \u0111\u1ea5t t\u1ea3o c\u00e1t, nh\u00f4m oxit, titan \u0111i\u00f4x\u00edt, \u00f4x\u00edt s\u1eaft, \u00f4x\u00edt k\u1ebdm, \u00f4x\u00edt magi\u00ea, b\u1ed9t \u0111\u00e1 b\u1ecdt, vv C\u00e1c hydroxit ch\u1ee7 y\u1ebfu bao g\u1ed3m: nh\u00f4m hydroxit, magie hydroxit, magie cacbonat c\u01a1 b\u1ea3n, v.v. Cacbonat ch\u1ee7 y\u1ebfu bao g\u1ed3m canxi cacbonat, magie cacbonat, dolomit, natri nh\u00f4m cacbonat c\u01a1 b\u1ea3n, v.v. (L\u01b0u hu\u1ef3nh) ch\u1ee7 y\u1ebfu bao g\u1ed3m bari sulfat, amoni sulfat, canxi sulfat, canxi sulfit, v.v. Silicat ch\u1ee7 y\u1ebfu bao g\u1ed3m b\u1ed9t talc, \u0111\u1ea5t s\u00e9t, mica, ami\u0103ng, canxi silicat, montmorillonite<\/a>, bentonit, h\u1ea1t th\u1ee7y tinh, s\u1ee3i th\u1ee7y tinh, v.v. Cacbon ch\u1ee7 y\u1ebfu bao g\u1ed3m cacbon \u0111en, than ch\u00ec, h\u00ecnh c\u1ea7u r\u1ed7ng cacbon, s\u1ee3i cacbon, v.v. Ngo\u00e0i ra, kho\u00e1ng phi kim lo\u1ea1i ch\u1ea5t \u0111\u1ed9n bao g\u1ed3m borat k\u1ebdm, borat canxi, borat natri, bari metaborat v\u00e0 titanat kali.<\/p>\n
Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang: Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang c\u00e0ng l\u1edbn th\u00ec \u00e1i l\u1ef1c gi\u1eefa ch\u1ea5t \u0111\u1ed9n v\u00e0 nh\u1ef1a c\u00e0ng t\u1ed1t, nh\u01b0ng b\u1ec1 m\u1eb7t ch\u1ea5t \u0111\u1ed9n c\u00e0ng kh\u00f3 k\u00edch ho\u1ea1t v\u00e0 gi\u00e1 th\u00e0nh c\u00e0ng cao.<\/p>\n
\u0110\u1ed9 c\u1ee9ng: \u0110\u1ed9 c\u1ee9ng cao c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n c\u1ee7a s\u1ea3n ph\u1ea9m, nh\u01b0ng n\u00f3 s\u1ebd l\u00e0m m\u00f2n thi\u1ebft b\u1ecb gia c\u00f4ng.<\/p>\n
M\u00e0u s\u1eafc: H\u1ea7u h\u1ebft vi\u1ec7c s\u1ea3n xu\u1ea5t nh\u1ef1a \u0111\u1ec1u y\u00eau c\u1ea7u Baidu c\u00e0ng cao c\u00e0ng t\u1ed1t.<\/p>\n
Quang h\u1ecdc: M\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9m c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng c\u1ee7a ch\u00fang \u0111\u1ec3 t\u0103ng nhi\u1ec7t \u0111\u1ed9, ch\u1eb3ng h\u1ea1n nh\u01b0: nh\u00e0 k\u00ednh nh\u1ef1a n\u00f4ng nghi\u1ec7p.<\/p>\n
\u0110i\u1ec7n: S\u1ef1 ng\u01b0ng t\u1ee5 ho\u1eb7c nghi\u1ec1n tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c h\u1ea1t l\u00e0m cho c\u00e1c li\u00ean k\u1ebft h\u00f3a tr\u1ecb b\u1ecb ph\u00e1 v\u1ee1 v\u00e0 t\u00edch \u0111i\u1ec7n, g\u00e2y ra s\u1ef1 ph\u00e2n b\u1ed1 h\u1ea1t kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u, \u0111i\u1ec1u n\u00e0y c\u1ea7n tr\u00e1nh trong th\u1ef1c t\u1ebf s\u1ea3n xu\u1ea5t.<\/p>\n
Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc: \u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n, c\u1ea5u tr\u00fac nh\u1ef1a v\u00e0 c\u00e1c \u0111\u1eb7c t\u00ednh \u0111\u1ecbnh t\u00ednh c\u1ee7a s\u1ea3n ph\u1ea9m. C\u00e1c lo\u1ea1i ch\u1ea5t \u0111\u1ed9n kh\u00e1c nhau c\u00f3 t\u00e1c d\u1ee5ng kh\u00e1c nhau \u0111\u1ed1i v\u1edbi s\u1ea3n ph\u1ea9m, v\u00e0 c\u00e1c ch\u1ea5t \u0111\u1ed9n kh\u00e1c nhau \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn t\u00f9y theo \u0111\u1eb7c t\u00ednh s\u1ea3n ph\u1ea9m y\u00eau c\u1ea7u.<\/p>\n
Hi\u1ec7u \u1ee9ng nhi\u1ec7t h\u00f3a: C\u00e1c polyme ph\u00e2n t\u1eed cao d\u1ec5 ch\u00e1y, nh\u01b0ng h\u1ea7u h\u1ebft c\u00e1c ch\u1ea5t \u0111\u1ed9n kho\u00e1ng v\u00f4 c\u01a1 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o n\u1ec1n polyme \u0111\u1ec3 l\u00e0m gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a ch\u1ea5t ch\u00e1y v\u00e0 l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh ch\u00e1y c\u01a1 b\u1ea3n do t\u00ednh kh\u00f4ng nh\u1ea5t qu\u00e1n c\u1ee7a ch\u00fang.<\/p>\n
Y\u00eau c\u1ea7u v\u1ec1 t\u00ednh n\u0103ng \u0111\u1ed1i v\u1edbi ch\u1ea5t \u0111\u1ed9n: \u1ed5n \u0111\u1ecbnh h\u00f3a h\u1ecdc cao, ch\u1ecbu nhi\u1ec7t t\u1ed1t, ph\u00e2n t\u00e1n v\u00e0 tr\u1ed9n l\u1eabn t\u1ed1t trong nh\u1ef1a nh\u1ef1a, \u0111\u1ed9 h\u1ea5p th\u1ee5 nh\u1ecf c\u1ee7a h\u1ea1t nh\u1ef1a, \u0111\u1ed9 tinh khi\u1ebft cao, kh\u00f4ng h\u00f2a tan trong dung m\u00f4i, kh\u00e1ng axit v\u00e0 ki\u1ec1m t\u1ed1t, v\u00e0 kh\u00f4ng h\u00fat \u1ea9m.<\/p>\n
Canxi cacbonat hi\u1ec7n l\u00e0 ch\u1ea5t \u0111\u1ed9n b\u1ed9t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1ea5t trong ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u1ef1a. Do gi\u00e1 th\u00e0nh r\u1ebb, m\u00e0u tr\u1eafng v\u00e0 hi\u1ec7u su\u1ea5t x\u1eed l\u00fd t\u1ed1t, canxi cacbonat n\u1eb7ng c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 t\u00ednh n\u0103ng c\u1ee7a ch\u1ea5t d\u1ebbo \u0111\u1ea7y, v\u00e0 li\u1ec1u l\u01b0\u1ee3ng c\u1ee7a n\u00f3 \u0111\u01b0\u1ee3c t\u0103ng l\u00ean r\u1ea5t nhi\u1ec1u.<\/p>\n
B\u1ed9t talc trong ch\u1ea5t d\u1ebbo c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 c\u1ee9ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t c\u1ee7a ch\u1ea5t d\u1ebbo, \u0111\u1ed3ng th\u1eddi c\u00f3 th\u1ec3 l\u00e0m t\u0103ng \u0111\u1ed9 truy\u1ec1n s\u00e1ng c\u1ee7a t\u1ef7 l\u1ec7 t\u00e1n x\u1ea1 m\u00e0ng trong ch\u1ea5t d\u1ebbo, v\u00e0 c\u00f3 t\u00e1c d\u1ee5ng ng\u0103n ch\u1eb7n tia h\u1ed3ng ngo\u1ea1i c\u00f3 b\u01b0\u1edbc s\u00f3ng 7-25\u03bcm. N\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c b\u1ed9 phim ch\u1ee9c n\u0103ng \u0111\u1ec3 c\u1ea3i thi\u1ec7n ban \u0111\u00eam c\u1ee7a nh\u00e0 k\u00ednh. Gi\u1eef nhi\u1ec7t v\u00e0 th\u00fac \u0111\u1ea9y s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e2y tr\u1ed3ng.<\/p>\n
Cao lanh trong v\u1eadt li\u1ec7u c\u00e1p PVC c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 kh\u1ea3 n\u0103ng c\u00e1ch \u0111i\u1ec7n c\u1ee7a v\u1ecf c\u00e1p; trong m\u00e0ng nh\u1ef1a, cao lanh c\u00f3 t\u00e1c d\u1ee5ng ng\u0103n tia h\u1ed3ng ngo\u1ea1i t\u1ed1t h\u01a1n b\u1ed9t talc, v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1eeda \u0111\u1ed5i m\u00e0ng n\u00f4ng nghi\u1ec7p; n\u00f3 c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho polypropylene \u0111\u1ec3 l\u00e0m ch\u1ea5t l\u00f5i \u0111\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc c\u1ee7a n\u00f3.<\/p>\n
Wollastonite c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t ch\u1ea5t gia c\u1ed1 nh\u1ef1a, c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m nh\u1ef1a, v\u00e0 c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 ch\u1ed1ng ch\u00e1y c\u1ee7a ch\u1ea5t ch\u1ed1ng ch\u00e1y h\u1eefu c\u01a1.<\/p>\n
C\u1ea5u tr\u00fac v\u1ea3y \u0111\u1ed9c \u0111\u00e1o c\u1ee7a mica l\u00e0m cho n\u00f3 tr\u1edf th\u00e0nh ch\u1ea5t \u0111\u1ed9n gia c\u01b0\u1eddng \u0111i\u1ec3n h\u00ecnh trong ch\u1ea5t d\u1ebbo, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u1ee7 y\u1ebfu \u0111\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 c\u1ee9ng, kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t v\u00e0 \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m nh\u1ef1a. Khi mica \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00e0ng nh\u1ef1a, kh\u1ea3 n\u0103ng truy\u1ec1n \u00e1nh s\u00e1ng ph\u00e2n t\u00e1n c\u1ee7a n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n r\u1ea5t nhi\u1ec1u, t\u1ed1t h\u01a1n so v\u1edbi c\u00e1c ch\u1ea5t \u0111\u1ed9n v\u00f4 c\u01a1 kh\u00e1c.<\/p>\n
Nh\u00f4m hydroxit v\u00e0 magie hydroxit c\u00f3 ba ch\u1ee9c n\u0103ng l\u00e0m \u0111\u1ea7y, ch\u1ed1ng ch\u00e1y v\u00e0 ng\u0103n kh\u00f3i trong nh\u1ef1a; ch\u00fang c\u0169ng l\u00e0 ph\u1ee5 gia ch\u00ednh cho b\u0103ng t\u1ea3i PVC \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u1ecf than, v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m \u0111\u1ea7y b\u1eb1ng nh\u1ef1a epoxy v\u00e0 c\u00e1c s\u1ea3n ph\u1ea9m polyester kh\u00f4ng b\u00e3o h\u00f2a. Th\u00eam \u0111\u1ea1i l\u00fd, s\u1ed1 ti\u1ec1n c\u00f3 th\u1ec3 \u0111\u1ea1t h\u01a1n 40%.<\/p>\n
\u1ea2nh h\u01b0\u1edfng c\u1ee7a c\u00e1c ch\u1ea5t \u0111\u1ed9n kh\u00e1c nhau \u0111\u1ebfn t\u00ednh ch\u1ea5t nh\u1ef1a<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
M\u00e0n bi\u1ec3u di\u1ec5n<\/td>\n | Canxi silicat<\/td>\n | Mica<\/td>\n | Talc<\/td>\n | Than ch\u00ec<\/td>\n | th\u1ea1ch anh<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
\u0110\u1ed9 b\u1ec1n k\u00e9o<\/td>\n | <\/td>\n | +<\/td>\n | 0<\/td>\n | <\/td>\n | <\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
C\u01b0\u1eddng \u0111\u1ed9 n\u00e9n<\/td>\n | <\/td>\n | <\/td>\n | +<\/td>\n | <\/td>\n | +<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
M\u00f4 \u0111un \u0111\u00e0n h\u1ed3i<\/td>\n | ++<\/td>\n | ++<\/td>\n | +<\/td>\n | <\/td>\n | +<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
S\u1ee9c m\u1ea1nh t\u00e1c \u0111\u1ed9ng<\/td>\n | –<\/td>\n | –<\/td>\n | –<\/td>\n | <\/td>\n | –<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Gi\u1ea3m s\u1ef1 gi\u00e3n n\u1edf nhi\u1ec7t<\/td>\n | <\/td>\n | +<\/td>\n | +<\/td>\n | +<\/td>\n | +<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Gi\u1ea3m co ng\u00f3t<\/td>\n | +<\/td>\n | +<\/td>\n | +<\/td>\n | +<\/td>\n | +<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
\u0110\u1ed9 d\u1eabn nhi\u1ec7t<\/td>\n | +<\/td>\n | <\/td>\n | +<\/td>\n | +<\/td>\n | +<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
\u1ed4n \u0111\u1ecbnh nhi\u1ec7t<\/td>\n | +<\/td>\n | <\/td>\n | +<\/td>\n | +<\/td>\n | <\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
\u0110\u1ed9 d\u1eabn \u0111i\u1ec7n<\/td>\n | <\/td>\n | <\/td>\n | <\/td>\n | +<\/td>\n | <\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
C\u00e1ch \u0111i\u1ec7n<\/td>\n | +<\/td>\n | ++<\/td>\n | +<\/td>\n | <\/td>\n | <\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t<\/td>\n | +<\/td>\n | +<\/td>\n | +<\/td>\n | <\/td>\n | +<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Kh\u00e1ng h\u00f3a ch\u1ea5t<\/td>\n | +<\/td>\n | +<\/td>\n | 0<\/td>\n | +<\/td>\n | <\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Mang s\u1ee9c \u0111\u1ec1 kh\u00e1ng<\/td>\n | <\/td>\n | +<\/td>\n | +<\/td>\n | +<\/td>\n | <\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
T\u1ed1c \u0111\u1ed9 \u0111\u00f9n<\/td>\n | <\/td>\n | +<\/td>\n | <\/td>\n | <\/td>\n | <\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Mang v\u00e0o m\u00e1y<\/td>\n | <\/td>\n | <\/td>\n | 0<\/td>\n | 0<\/td>\n | –<\/td>\n<\/tr>\n | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Kh\u00f4ng t\u1ed1n k\u00e9m<\/td>\n | +<\/td>\n | +<\/td>\n | +<\/td>\n | +<\/td>\n | ++<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n (++ c\u00f3 ngh\u0129a l\u00e0 hi\u1ec7u qu\u1ea3 cao, + hi\u1ec7u qu\u1ea3 trung b\u00ecnh, 0 kh\u00f4ng h\u1ee3p l\u1ec7, – t\u00e1c \u0111\u1ed9ng ng\u01b0\u1ee3c)<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
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