-
Yam khoom Lab siv cov koob txhaj tshuaj tsis pub siv pov tseg Hoobkas ncaj qha muag
Nqe lus piav qhia Cov khoom muaj lub foob zoo kom tsis txhob xau. Thaum lub sij hawm tsim cov txheej txheem, cov nplai kab yog txhaj molded ib zaug, uas tsis muaj kuab paug rau cov khoom. Lub raj mis PE siv tau zoo dua kom tsis txhob muaj tshuaj lom neeg, thiab tsim nyog rau cov qauv ntim thiab tshuaj reagent sampling. Cov non-stopper yog siv kom tsis txhob muaj nag lossis daus ntawm cov tshuaj lom neeg hauv cov roj hmab stopper, thiab muaj peev xwm kis tau tus qauv los ntawm cov oxidants seem thaum lub sij hawm ...
