1.Pure tooj liab plated, kub tsev pheeb suab.
2.Small loj, kub plated koob txheej txheem, tiv thaiv cov khoom siv corrosion.
3. Kev yooj yim, nrawm thiab ruaj khov.
1.Miav cov khoom siv, cov khoom lag luam zoo nkauj, thiab cov khau raj ntawm lub tsev, hluav taws xob, vr, thiab lwm yam ntsiav tshuaj, hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob, hluav taws xob Xauvs, hluav taws xob tsheb, khob dej txias. Txawb xov tooj ntawm tes. Them cov ntaub ntawv cable, thiab lwm yam.