Popanga semiconductor, kugwiritsa ntchito zida za granite kwakondedwa ndi opanga ambiri.Granite ndi mtundu wa mwala woyaka moto womwe nthawi zambiri umapangidwa ndi miyala ya quartz, mica, ndi feldspar.Makhalidwe ake, omwe amaphatikizapo kukhazikika kwapamwamba kwambiri ...
Werengani zambiri