Sab nraum zoov tua yas roj hmab npas 0. 43mm precision roj hmab pob kev ua si tshwj xeeb

Cov khoom lag luam tua hluav taws xob tua hluav taws xob tshiab cov khoom siv roj hmab, roj hmab khoom siv roj hmab: {{{}}. {2}}. 68mm