一 .Quartz pob zeb yog ib yam tshiab ntawm pob zeb ua los ntawm ntau tshaj 90% quartz siv lead ua ntxiv cob thiab lwm yam kab.Qhov zoo: siab hardness, nyuaj txaus, qhov saum npoo tsis yooj yim rau khawb, tus nqi sib tw ntau dua, xim ruaj khov dua.Disadvantages: low-end slab yog ib qho yooj yim rau cr...
Nyeem ntxiv