Tsev 12 Rau sab kawg

Xav tias dawb yuav ammonium molybdate ntawm tus nqi pheej yig los ntawm peb lub hoobkas. Raws li ib qho ntawm cov kws tshaj lij ammonium molybdate tuam ntxhab thiab cov muag khoom, peb ib txwm nyob ntawm koj qhov kev pabcuam.

Xa kev nug