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单词 overcoil
释义

overcoil

/ˈəʊvəkɔɪl/
Watchmaking and Clockmaking
noun
The last coil of a Breguet hairspring, having the outer quarter turn raised and curved towards the centre to improve timekeeping.

Origin

Late 19th century; earliest use found in Frederick Britten (1843–1913). From over- + coil.

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更新时间:2024/12/23 6:18:50