-
Umgangatho wofikelelo omkhulu weGRC
Umgangatho ophakamileyo we-GRC sisizukulwana esitsha somgangatho wothungelwano olusingqongileyo owenziwe nge-silicate, i-inorganic fiber, i-fiber mineral, isanti ye-quartz kunye namanye amacandelo ngokubunjwa koxinzelelo oluphezulu.Umgangatho ukhululekile naziphi na izinto ezinobuthi ezinobuthi kunye nemitha, inokuchithwa ngokupheleleyo, kwaye ubomi benkonzo bufana nesakhiwo.
