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Caused by breathing the dust removal of silicon dioxide (Sillicon dioxide). Visit (A type of silica silica compounds, chemical formula is SiO2 1700 oC boiling point melting point solid 2230 oC colorless crystalline structure 5 format. In nature, in the form of sand and stones, some type of neck, wot uses in the glass manufacturing industry. Polishing powder. Refractory and ceramic products, etc.).
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