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planet gear英英字典_planet gear剑桥英语解释_planet gear柯林斯英文解释_按摩法牛津词典
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planet gear

P 开头单词

柯林斯词典

    planet wheel (also planet gear)

  • 1. N any one of the wheels of an epicyclic gear train that orbits the central axis of the train 行星齿轮

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