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  • ID:9436-7509

    (翻译)It is seldom that a design problem has only one right answer, a situation that is often annoying to the beginner in machine design

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  • ID:9436-7515

    (翻译)计算机正在将制造业带入信息时代。

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  • ID:9436-7500

    (翻译)联轴器是用来把两个相邻轴端联接起来的装置。在机械结构中,联轴器被用来实现相邻的两根转轴之间的半永久性联接。

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  • ID:9436-9063
    (翻译)Around 77% consists of metals ,which are ,on the whole ,easily recyclabe ,albeit with some degradation in quality.

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  • ID:9436-7505

    (翻译)Force F is a vector. The characteristics of a force are its magnitude, its direction, and its point of application

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  • ID:9436-7499

    (翻译)所有的物体,不管是弹性体还是塑性体,在外力作用下都将产生变形。当物体的变性非常小时,为了简化计算,通常假设这个物体是刚体,也就是认为它没有发生变形。

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