Ib Chipper Hniav nrog Txawv Hardness
Feb 25, 2019
Lub hlis no, peb tau txais ib daim ntawv thov chipper. Qhov yuav tsum tau yog tshwj xeeb. Lub zog ntawm qhov sib txawv ntawm cov chipper hniav yog txawv. Nws tsis yooj yim los ua xws chipper hniav rau peb.
