Qhia koj peb cov rhiav rooj zoo thiab cov khoom siv tau siv dav hlau / Cov Khaub Ncaws Hnav / Cov Khaub Ncaws Hnav Khaub Ncaws / Cov Khaub Ncaws Hnav Cov pa Oxygen / Oxidation / Thermal lub zog hluav taws xob. Lub Sijhawm Post: Apr-08-2022