5 Ml 7ML Cov Ntawv Pov Thawj Me Me Cov Ntaub Ntawv Ntsig Yooj Yim

Tus me nyuam Cov Tsho Tiv Thaiv Iav Yooj Yim rau lub ntim zoo koj cov khoom lag luam. Cov iav ntim ntim no yog lub ntim huv thiab ntim cov tshuaj, muab qhov tsis ua pa, tsw phem thiab cov pa nkag uas ua rau koj cov khoom tshiab. Cov hau yas siv qhov yooj yim thawb thiab tig qhib thiab kaw txoj kev uas tau ua daim ntawv tso cai tiv thaiv menyuam yaus ASTM D3475 thiab CFR Npe 16, Ntu 1700 ....