Ceramic foundry sand, yomwe imatchedwanso ceramsite, cerabeads, ndi mchenga wabwino wopangira mchenga.Yerekezerani ndi mchenga wa silika, umakhala ndi refractoriness wapamwamba, kukulitsa pang'ono kwamafuta, kokwanira bwino kwa angular, kuyenda bwino kwambiri, kukana kuvala, kubwezeretsedwanso kwakukulu ...
Werengani zambiri