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  1. brake block

    • IPA[ˈbrāk ˌbläk]
    • n.
      a block of hard material pressed against the rim of a wheel to slow it down by friction, typically one of a pair made of hardened rubber used on a bicycle.
    • noun: brake block, plural noun: brake blocks

    • 更多解釋
    • n.
      a block of hard material pressed against the rim of a wheel to slow it down by friction, ...

    Oxford Dictionary