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單詞乎

pulley block

pulley block是什么意思、pulley block怎么讀

pulley block漢語翻譯

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pulley block英語解釋

名詞 pulley block:

  1. a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope
    同義詞：pulley, pulley-block, block
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