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ball-bearing英英字典_ball-bearing剑桥英语解释_ball-bearing柯林斯英文解释_食材铺反向词典
食材铺反向词典

ball-bearing

B 开头单词

柯林斯词典

    ball bearing (also ball-bearing) (ball bearings)

  • 1. N-COUNT Ball bearings are small metal balls placed between the moving parts of a machine to make the parts move smoothly. 滚珠轴承

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