H\u1ecfi \u0111\u00e1p v\u1ec1 kh\u1ea9u trang 3M ch\u1ed1ng \u0111\u1ed9c ch\u1ed1ng b\u1ee5i m\u1ecbn KN90 KN95 N95 FFP2 FFP3\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\tKh\u1ea9u trang 3M gi\u1eef l\u1ea1i kh\u00ed carbon l\u1ea1i b\u00ean trong kh\u1ea9u trang hay kh\u00f4ng? Vi\u1ec7c n\u00e0y c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ee9c kh\u1ecfe hay kh\u00f4ng?\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\tKh\u1ea9u trang 3M gi\u1eef l\u1ea1i kh\u00ed carbon l\u1ea1i b\u00ean trong kh\u1ea9u trang hay kh\u00f4ng? Vi\u1ec7c n\u00e0y c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ee9c kh\u1ecfe hay kh\u00f4ng?\n\t\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t- \n\t\t\t\t\t\t\t\t
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