Yuav ua li cas xaiv cov khoom cia txias rau koj cov qauv kho mob, tshuaj, tshuaj reagents, thiab lwm yam khoom siv kub.Tom qab nyeem ntawv hauv qab no kev sib piv ntawm cov tub yees kho mob thiab cov tub yees hauv tsev, koj yuav muaj lub tswv yim meej tias koj yuav tsum xaiv dab tsi.Conclusion: Qhov kub thiab txias envi...
Nyeem ntxiv