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Start Over You searched for: Author National Bureau of Standards Remove constraint Author: National Bureau of Standards Catalog Issue Year Decade 1930 - 1939 Remove constraint Catalog Issue Year Decade: 1930 - 1939

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233. Air conditioning, publications of interest.

235. Metals do not crystallize under vibration.

237. Abrasives. Coated abrasive products.

238. Ages. Forged axes.