M\u1eb7t n\u1ea1 ph\u00f2ng \u0111\u1ed9c<\/a><\/h2>\n\n\n\n1) Ti\u00eau chu\u1ea9n chung c\u1ee7a m\u1eb7t n\u1ea1 ph\u00f2ng \u0111\u1ed9c<\/h3>\n\n\n\n
_2 phin l\u1ecdc, c\u00f3 kh\u1ea3 n\u0103ng l\u1ecdc kh\u00f4ng kh\u00ed t\u1ed1t l\u00ean \u0111\u1ebfn 99.9%<\/p>\n\n\n\n
_\u0110\u01b0\u1ee3c s\u1ea3n xu\u1ea5t v\u1edbi ch\u1ea5t li\u1ec7u silicon d\u1ebbo dai gi\u00fap b\u1ea1n c\u1ea3m gi\u00e1c tho\u1ea3i m\u00e1i trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng<\/p>\n\n\n\n
_Kh\u00f4ng g\u00e2y k\u00edch \u1ee9ng da, kh\u00f4ng l\u1ea1i \u0111\u1ec3 v\u1ebft h\u1eb1n sau th\u1eddi gian d\u00e0i s\u1eed d\u1ee5ng<\/p>\n\n\n\n