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planet wheel英英字典_planet wheel剑桥英语解释_planet wheel柯林斯英文解释_果味酸柯林斯词典
果味酸柯林斯词典

planet wheel

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 行星齒輪

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