-
Hollow Ob Chav Chav Qhov rai
Lub qhov rais ob-txheej huv si yog ob-txheej hollow iav, nrog zoo sealing kev ua tau zoo thiab kub rwb thaiv tsev kev ua tau zoo.Raws li cov duab, nws tuaj yeem muab faib ua puag ncig thiab square ntug purification qhov rais;Raws li cov khoom siv, nws tuaj yeem muab faib ua: zoo li tus ncej purification qhov rais;Aluminium alloy ncej purification qhov rais;Stainless hlau ncej purification qhov rais.
