Glass faibha akazvarwa 1930s. Zviri rudzi inorganic asiri esimbi zvinhu zvinoberekwa pyrophyllite, Goldstone jecha, reraimu, dolomite, calcite, brucite, boric acid, pasoda dota nezvimwe namakemikari mbishi zvinhu. It ane chiedza uremu, mukuru simba, mukuru uye vakaderera tembiricha nemishonga, corrosio ...
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