- a very fine spiral spring in some timepieces, which, in combination with the balance wheel, controls the timekeeping
| 单词 | hairspring |
| 释义 | WordReference Random House Unabridged Dictionary of American English © 2024 hair•spring (hâr′spring′),USA pronunciation n. [Horol.]
Collins Concise English Dictionary © HarperCollins Publishers:: hairspring /ˈhɛəˌsprɪŋ/ n
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