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词汇 ball bearing
释义

ball bearing

noun
/ˌbɔːl ˈbeərɪŋ/
/ˌbɔːl ˈberɪŋ/
  1. enlarge image
    a ring of small metal balls used in a machine to enable the parts to turn smoothly; one of these small metal balls球轴承;滚珠轴承;滚珠
    Topics Engineeringc2
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