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  1. 1
    国标GB3480—83 GB3481—83将开始实施

    国标GB3480—83 GB3481—83将开始实施 by 阎长新

    Published 1983-01-01
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  2. 2
    国家标准“渐开线圆柱齿轮承载能力计算方法”的介绍

    国家标准“渐开线圆柱齿轮承载能力计算方法”的介绍 by 刘筱安, 阎长新

    Published 1983-01-01
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