{"id":2216,"date":"2023-05-15T10:24:34","date_gmt":"2023-05-15T02:24:34","guid":{"rendered":"https:\/\/www.qualitester.com\/?p=2216"},"modified":"2023-08-15T09:35:33","modified_gmt":"2023-08-15T01:35:33","slug":"the-testing-principle-and-technical-characteristics-of-the-packaging-airtightness-tester","status":"publish","type":"post","link":"https:\/\/www.qualitester.com\/vi\/the-testing-principle-and-technical-characteristics-of-the-packaging-airtightness-tester\/","title":{"rendered":"Nguy\u00ean l\u00fd th\u1eed nghi\u1ec7m v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt c\u1ee7a m\u00e1y ki\u1ec3m tra \u0111\u1ed9 k\u00edn kh\u00ed c\u1ee7a bao b\u00ec"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"2216\" class=\"elementor elementor-2216\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c3b3d17 e-flex e-con-boxed e-con e-parent\" data-id=\"c3b3d17\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-45c5a06 elementor-widget elementor-widget-text-editor\" data-id=\"45c5a06\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><strong>Nguy\u00ean l\u00fd th\u1eed nghi\u1ec7m v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt c\u1ee7a m\u00e1y ki\u1ec3m tra \u0111\u1ed9 k\u00edn kh\u00ed c\u1ee7a bao b\u00ec<\/strong><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f17f780 e-flex e-con-boxed e-con e-parent\" data-id=\"f17f780\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-bc26b9a elementor-widget elementor-widget-text-editor\" data-id=\"bc26b9a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>M\u00e1y ki\u1ec3m tra r\u00f2 r\u1ec9 bao b\u00ec c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u00e1y ph\u00e1t hi\u1ec7n r\u00f2 r\u1ec9 bao b\u00ec. \u0110\u00e2y l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u00e1c doanh nghi\u1ec7p s\u1ea3n xu\u1ea5t v\u00e0 ch\u1ebf bi\u1ebfn chuy\u00ean d\u00f9ng \u0111\u1ec3 ki\u1ec3m tra \u0111\u1ed9 k\u00edn kh\u00ed c\u1ee7a t\u00fai bao b\u00ec, chai, l\u1ecd v\u00e0 c\u00e1c lo\u1ea1i v\u1eadt ch\u1ee9a kh\u00e1c trong ng\u00e0nh th\u1ef1c ph\u1ea9m, s\u1eefa v\u00e0 d\u01b0\u1ee3c ph\u1ea9m, \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ea3n ph\u1ea9m kh\u00f4ng b\u1ecb r\u00f2 r\u1ec9 do bao b\u00ec. V\u00e0 t\u1ea1o ra c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng (m\u1ed9t s\u1ed1 \u0111i\u1ec3m r\u00f2 r\u1ec9 kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y b\u1eb1ng m\u1eaft th\u01b0\u1eddng), k\u00e9o d\u00e0i th\u1eddi h\u1ea1n s\u1eed d\u1ee5ng c\u1ee7a s\u1ea3n ph\u1ea9m.<\/p><p>Ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m d\u1ef1a tr\u00ean \u201cGB\/T15171-94 Ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m hi\u1ec7u su\u1ea5t ni\u00eam phong c\u1ee7a c\u00e1c g\u00f3i linh ho\u1ea1t\u201d<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-cbb979d e-flex e-con-boxed e-con e-parent\" data-id=\"cbb979d\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0050609 elementor-widget elementor-widget-text-editor\" data-id=\"0050609\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><b>Bao b\u00ec linh ho\u1ea1t<\/b><\/p><p>\u0110\u1ed1i v\u1edbi bao b\u00ec m\u1ec1m c\u00f3 kh\u1ea3 n\u0103ng k\u00edn kh\u00ed, v\u1eadt li\u1ec7u \u0111\u00f3ng g\u00f3i s\u1eed d\u1ee5ng kh\u00f4ng \u0111\u01b0\u1ee3c c\u00f3 b\u1ea5t k\u1ef3 khuy\u1ebft t\u1eadt n\u00e0o \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng k\u00edn kh\u00ed nh\u01b0 l\u1ed7 kim, v\u1ebft n\u1ee9t, m\u1ed1i h\u00e0n kh\u00f4ng k\u00edn v\u00e0 kh\u00f4ng c\u00f3 m\u1ed1i h\u00e0n k\u00edn.<\/p><p><b>Hi\u1ec7u su\u1ea5t ni\u00eam phong<\/b><\/p><p>Kh\u1ea3 n\u0103ng c\u1ee7a bao b\u00ec m\u1ec1m trong vi\u1ec7c ng\u0103n ch\u1eb7n s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a c\u00e1c ch\u1ea5t kh\u00e1c ho\u1eb7c s\u1ef1 tho\u00e1t ra ngo\u00e0i c\u1ee7a h\u00e0ng h\u00f3a.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b92b3c7 e-flex e-con-boxed e-con e-parent\" data-id=\"b92b3c7\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0acc25f elementor-widget elementor-widget-text-editor\" data-id=\"0acc25f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><b>Nguy\u00ean l\u00fd th\u1eed nghi\u1ec7m<\/b><\/p><p><b>Ph\u01b0\u01a1ng ph\u00e1p M\u1ed9t<\/b><\/p><p>Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c g\u00f3i m\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u b\u00ean ngo\u00e0i d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a n\u01b0\u1edbc s\u1ebd kh\u00f4ng b\u1ecb gi\u1ea3m \u0111\u00e1ng k\u1ec3 trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c g\u00f3i c\u00f3 l\u1edbp m\u00e0ng nh\u1ef1a b\u00ean ngo\u00e0i.<br \/>B\u1eb1ng c\u00e1ch h\u00fat ch\u00e2n kh\u00f4ng kh\u1ecfi bu\u1ed3ng ch\u00e2n kh\u00f4ng, m\u1eabu nh\u00fang v\u00e0o n\u01b0\u1edbc s\u1ebd t\u1ea1o ra s\u1ef1 ch\u00eanh l\u1ec7ch \u00e1p su\u1ea5t gi\u1eefa b\u00ean trong v\u00e0 b\u00ean ngo\u00e0i, \u0111\u1ed3ng th\u1eddi quan s\u00e1t kh\u00ed tho\u00e1t ra ho\u1eb7c n\u01b0\u1edbc th\u1ea5m v\u00e0o m\u1eabu, t\u1eeb \u0111\u00f3 x\u00e1c \u0111\u1ecbnh hi\u1ec7u su\u1ea5t b\u1ecbt k\u00edn c\u1ee7a m\u1eabu.<\/p><p><b>Ph\u01b0\u01a1ng ph\u00e1p Hai<\/b><\/p><p>Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c bao b\u00ec m\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u b\u00ean ngo\u00e0i s\u1ebd gi\u1ea3m \u0111\u00e1ng k\u1ec3 trong th\u1eddi gian th\u1eed nghi\u1ec7m d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a n\u01b0\u1edbc, ch\u1eb3ng h\u1ea1n nh\u01b0 bao b\u00ec c\u00f3 l\u1edbp v\u1eadt li\u1ec7u gi\u1ea5y b\u00ean ngo\u00e0i.<\/p><p><b>Thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m<br \/><\/b>Thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m s\u1ebd \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c ph\u1ea7n sau.<\/p><p>Bu\u1ed3ng ch\u00e2n kh\u00f4ng: G\u1ed3m m\u1ed9t b\u00ecnh ch\u1ee9a ch\u00e2n kh\u00f4ng l\u00e0m b\u1eb1ng v\u1eadt li\u1ec7u trong su\u1ed1t c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c \u00e1p su\u1ea5t 100kPa v\u00e0 m\u1ed9t n\u1eafp \u0111\u1eady k\u00edn.<\/p><p>B\u00ecnh ch\u1ee9a ch\u00e2n kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ee9a ch\u1ea5t l\u1ecfng th\u1eed nghi\u1ec7m v\u00e0 m\u1eabu th\u1eed nghi\u1ec7m; n\u1eafp \u0111\u1eady k\u00edn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ecbt k\u00edn bu\u1ed3ng ch\u00e2n kh\u00f4ng. Khi h\u00fat ch\u00e2n kh\u00f4ng, n\u1eafp \u0111\u1eady k\u00edn ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 k\u00edn kh\u00ed c\u1ee7a bu\u1ed3ng ch\u00e2n kh\u00f4ng.<\/p><p>Trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m, \u0111\u1ed9 ch\u00e2n kh\u00f4ng t\u1ed1i \u0111a c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c trong bu\u1ed3ng ch\u00e2n kh\u00f4ng kh\u00f4ng \u0111\u01b0\u1ee3c th\u1ea5p h\u01a1n 95 kPa v\u00e0 \u0111\u1ed9 ch\u00e2n kh\u00f4ng c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c t\u1eeb \u00e1p su\u1ea5t kh\u00ed quy\u1ec3n b\u00ecnh th\u01b0\u1eddng trong v\u00f2ng 30-60 gi\u00e2y.<\/p><p>\u0110\u1ed3 g\u00e1 m\u1eabu: d\u00f9ng \u0111\u1ec3 c\u1ed1 \u0111\u1ecbnh m\u1eabu trong ch\u1ea5t l\u1ecfng th\u1eed nghi\u1ec7m trong bu\u1ed3ng ch\u00e2n kh\u00f4ng, v\u1eadt li\u1ec7u v\u00e0 h\u00ecnh d\u1ea1ng c\u1ee7a \u0111\u1ed3 g\u00e1 kh\u00f4ng \u0111\u01b0\u1ee3c \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a m\u1eabu v\u00e0 quan s\u00e1t th\u1eed nghi\u1ec7m.<\/p><p>\u0110\u01b0\u1eddng \u1ed1ng: bao g\u1ed3m \u1ed1ng ch\u00e2n kh\u00f4ng \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi ngu\u1ed3n ch\u00e2n kh\u00f4ng v\u00e0 \u1ed1ng x\u1ea3 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi kh\u00ed quy\u1ec3n. C\u1ea3 hai \u0111\u1ec1u ph\u1ea3i \u0111\u01b0\u1ee3c l\u1eafp van.<\/p><p>\u0110\u1ed3ng h\u1ed3 \u0111o ch\u00e2n kh\u00f4ng: D\u00f9ng \u0111\u1ec3 \u0111o \u0111\u1ed9 ch\u00e2n kh\u00f4ng trong bu\u1ed3ng ch\u00e2n kh\u00f4ng, \u0111\u1ed9 ch\u00ednh x\u00e1c kh\u00f4ng \u0111\u01b0\u1ee3c th\u1ea5p h\u01a1n c\u1ea5p 1,5.<\/p><p>Thi\u1ebft b\u1ecb \u0111i\u1ec1u khi\u1ec3n: bao g\u1ed3m c\u00f4ng t\u1eafc ch\u00e2n kh\u00f4ng, thi\u1ebft b\u1ecb \u0111i\u1ec1u ch\u1ec9nh ch\u00e2n kh\u00f4ng, van n\u1ea1p, v.v.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1bd995b e-flex e-con-boxed e-con e-parent\" data-id=\"1bd995b\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-097d220 elementor-widget elementor-widget-text-editor\" data-id=\"097d220\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><b>T\u00ednh n\u0103ng s\u1ea3n ph\u1ea9m<\/b><\/p><p>Qu\u00e1 tr\u00ecnh ki\u1ec3m tra ho\u00e0n to\u00e0n t\u1ef1 \u0111\u1ed9ng<\/p><p>Giao di\u1ec7n ng\u01b0\u1eddi m\u00e1y, thao t\u00e1c tr\u00ean m\u00e0n h\u00ecnh c\u1ea3m \u1ee9ng<\/p><p>C\u00e0i \u0111\u1eb7t th\u1eddi gian th\u1eed nghi\u1ec7m v\u00e0 m\u1ee9c \u0111\u1ed9 ch\u00e2n kh\u00f4ng k\u1ef9 thu\u1eadt s\u1ed1<\/p><p>T\u1ef1 \u0111\u1ed9ng b\u1ea3o tr\u00ec ch\u00e2n kh\u00f4ng v\u00e0 th\u1ed5i ng\u01b0\u1ee3c x\u1ea3 h\u00e0ng<\/p><p>N\u0103m b\u1ed9 l\u01b0u tr\u1eef c\u00e0i \u0111\u1eb7t tham s\u1ed1 th\u1eed nghi\u1ec7m<\/p><p>Th\u1ed1ng k\u00ea t\u1ef1 \u0111\u1ed9ng v\u00e0 l\u01b0u tr\u1eef k\u1ebft qu\u1ea3 ki\u1ec3m tra<\/p><p>Bu\u1ed3ng ch\u00e2n kh\u00f4ng si\u00eau d\u00e0y b\u1eb1ng k\u00ednh plexiglass<\/p><p><span style=\"font-style: inherit; font-weight: inherit; text-align: var(--text-align); background-color: var(--ast-global-color-5); color: var(--ast-global-color-3);\">Bu\u1ed3ng ch\u00e2n kh\u00f4ng c\u00f3 k\u00edch th\u01b0\u1edbc kh\u00f4ng chu\u1ea9n c\u00f3 th\u1ec3 t\u00f9y ch\u1ec9nh<\/span><\/p><p>Ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng l\u00e0 kh\u00ed n\u00e9n, kh\u00f4ng c\u1ea7n b\u01a1m ch\u00e2n kh\u00f4ng<\/p><p>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt<\/p><p>\u0110\u1ed9 ch\u00e2n kh\u00f4ng: 0~-90KPa<\/p><p>Bu\u1ed3ng ch\u00e2n kh\u00f4ng: \u03a6270 mmx210 mm (H) (c\u00f3 th\u1ec3 t\u00f9y ch\u1ec9nh c\u00e1c k\u00edch th\u01b0\u1edbc kh\u00e1c)<\/p><p>K\u00edch th\u01b0\u1edbc: 300mm(D)X380mm(R)X500mm(C)<\/p><p>Ngu\u1ed3n kh\u00ed: m\u00e1y n\u00e9n kh\u00ed<\/p><p>\u00c1p su\u1ea5t ngu\u1ed3n kh\u00ed: 0,7MPa (ngu\u1ed3n kh\u00ed do ng\u01b0\u1eddi d\u00f9ng cung c\u1ea5p)<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-cdff2da e-flex e-con-boxed e-con e-parent\" data-id=\"cdff2da\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4475383 elementor-widget elementor-widget-image\" data-id=\"4475383\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.qualitester.com\/vi\/san-pham\/leak-tester-lt-03\/\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"750\" height=\"750\" src=\"https:\/\/www.qualitester.com\/wp-content\/uploads\/2023\/04\/leak-tester-LT-03-1.jpg\" class=\"attachment-large size-large wp-image-1743\" alt=\"\" srcset=\"https:\/\/www.qualitester.com\/wp-content\/uploads\/2023\/04\/leak-tester-LT-03-1.jpg 750w, https:\/\/www.qualitester.com\/wp-content\/uploads\/2023\/04\/leak-tester-LT-03-1-300x300.jpg 300w, https:\/\/www.qualitester.com\/wp-content\/uploads\/2023\/04\/leak-tester-LT-03-1-150x150.jpg 150w, https:\/\/www.qualitester.com\/wp-content\/uploads\/2023\/04\/leak-tester-LT-03-1-600x600.jpg 600w, https:\/\/www.qualitester.com\/wp-content\/uploads\/2023\/04\/leak-tester-LT-03-1-100x100.jpg 100w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d7db79d e-flex e-con-boxed e-con e-parent\" data-id=\"d7db79d\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fa0a520 elementor-widget elementor-widget-text-editor\" data-id=\"fa0a520\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h5><a href=\"https:\/\/www.qualitester.com\/vi\/san-pham\/leak-tester-lt-03\/\">M\u00e1y ki\u1ec3m tra r\u00f2 r\u1ec9 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k\u00edn kh\u00ed bao b\u00ec M\u00e1y ki\u1ec3m tra r\u00f2 r\u1ec9 bao b\u00ec c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u00e1y d\u00f2 r\u00f2 r\u1ec9 bao b\u00ec. \u0110\u00e2y l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u00e1c doanh nghi\u1ec7p s\u1ea3n xu\u1ea5t v\u00e0 ch\u1ebf bi\u1ebfn chuy\u00ean d\u00f9ng \u0111\u1ec3 ki\u1ec3m tra \u0111\u1ed9 k\u00edn kh\u00ed c\u1ee7a t\u00fai bao b\u00ec, chai, l\u1ecd v\u00e0 c\u00e1c lo\u1ea1i v\u1eadt ch\u1ee9a kh\u00e1c trong ng\u00e0nh th\u1ef1c ph\u1ea9m, s\u1eefa v\u00e0 d\u01b0\u1ee3c ph\u1ea9m, \u0111\u1ec3 \u2026<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.qualitester.com\/vi\/the-testing-principle-and-technical-characteristics-of-the-packaging-airtightness-tester\/\"> <span class=\"screen-reader-text\">Nguy\u00ean l\u00fd th\u1eed nghi\u1ec7m v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt c\u1ee7a m\u00e1y ki\u1ec3m tra \u0111\u1ed9 k\u00edn kh\u00ed c\u1ee7a bao b\u00ec<\/span> \u0110\u1ecdc th\u00eam 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