metallic, siliceous, or calcareous basework, including chemical bleaching, oxidation or reduction (class / ) including forming a solidified or hardened coating for cleaning (class / ) including melting (class / ) using solid work treating agents (class / ) including regeneration, purification, recovery...
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is gallium arsenide . gallium arsenide was developed in the s as a semiconductor with somewhat different electrical properties than the more common silicon , and that is more suited than silicon to some applications. notably, gallium arsenide is a direct band gap semiconductor, which means that it can...
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