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Search results for keyword: planetoid
planetary mill
Roller Planets The exploration of space is an eternal dream of mankind. With the progress of science and technology, human beings have increased the possibility of space exploration. Roller planets are one of the great innovations in space exploration technology. Basically, a roller planet is a ......
silicon
Silicon Silicon is a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and 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 ......
tags: silicon used most its silicon also
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Emily
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