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  1. hairspring

    • IPA[ˈherˌspriNG]

    美式

    • n.
      a slender flat coiled spring regulating the movement of the balance wheel in a watch.
    • noun: hairspring, plural noun: hairsprings

    • 更多解釋
    • IPA[ˈhɛːsprɪŋ]

    英式

    • n.
      a slender flat coiled spring regulating the movement of the balance wheel in a watch.

    Oxford Dictionary

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