Glass ifayibha wazalelwa-1930. It is a uhlobo ezingaphiliyo izinto non-ebuntsimbi eveliswe yi pyrophyllite, isanti zwi, lekalika, dolomite, calcite, brucite, boric acid, soda uthuthu kunye nezinye izinto imichiza ekrwada. Kuye ubunzima ukukhanya, amandla aphezulu, ukumelana phezulu nezisezantsi ubushushu, corrosio ...
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