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on Dec 15th 2002, 06:55:12, Archer wrote the following aboutaluminium |
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Alum was once used as an astringent and as a mordant in dyeing. Its electrical conductivity is only about 60% that of copper, it is used in electrical transmission lines because of its light weight. Pure aluminum is soft and lacks strength, but it can be alloyed with small amounts of copper, magnesium, silicon, manganese, and other elements to impart a variety of useful properties. |
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