Air hygiene
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R.H.O.
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Article
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1939
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Elsevier Science
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English
โ 115 KB
An Unusual Metal.--Colalloy, a non-ferrous silvery metal, two-thirds lighter than steel and most common metals, unusually resistant to corrosion, outstanding in electrical and thermal conductivity, strong, workable, beautiful, and low in cost, is in production. This metal is made in all the forms, s