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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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  • ID:9436-9061

    2-3% vehicle exhaust emissions consist of toxic substances such as:

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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:9436-9058
    The parts of car can be grouped into four major categories: engine,

    and

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  • ID:9436-7513

    (翻译)力通过配合表面传到机器中的各构件上。

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  • ID:9436-9073
    Generally, an engine consists of two mechanisms and five systems. They are and the lubrication system。

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