Crawler Hydraulic Rock Crusher Hb20

2019731silicon is a chemical element with the symbol si and atomic number 14. it is a hard and brittle crystalline solid with a bluegrey metallic lustre and it is a tetravalent metalloid and semiconductor.it is a member of group 14 in the periodic table carbon is above it and germanium, tin, and lead are below it. it is relatively unreactive.

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