Kev Tshaj Tawm Tshiab

Peb lub tshuab hluav taws xob hloov pauv tshiab tau ntxiv cov lus qhia tshiab. Txhawm rau ua kom tau raws li qhov xav tau ntawm cov neeg siv khoom, los ntawm kev siv zog ntawm cov kws tsim khoom thiab cov kws tshaj lij, raws li lub hauv paus ntawm txoj kab uas hla ntawm 6.5mm thiab 8.5mm, ib txoj kab tshiab ntawm 8mm tau ntxiv los ua kom tau raws li cov neeg siv khoom xav tau rau cov kab sib txawv.