Sebopeho le litšobotsi tsa fiberglass Likarolo tse kholo ke silika, alumina, calcium oxide, boron oxide, magnesium oxide, sodium oxide, joalo-joalo Ho ea ka bongata ba alkali ka khalase, e ka aroloa ka: ①, fiberglass e seng alkali. (sodium oxide 0% ~ 2%, ke aluminium bor ...
Bala haholoanyane