Okun gilasi ni a bi ni awọn ọdun 1930.O jẹ iru ohun elo inorganic ti kii ṣe irin ti a ṣe nipasẹ pyrophyllite, iyanrin quartz, limestone, dolomite, calcite, brucite, boric acid, eeru soda ati awọn ohun elo aise kemikali miiran.O ni iwuwo ina, agbara giga, giga ati kekere resistance otutu, corrosio ...
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