英语词汇“safety pinion”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	safety pinion
释义	safety pinion safety pinion [′sāf·tē ‚pin·yən] (horology) A center pinion gear in a watch that protects delicate parts by unscrewing when the mainspring breaks, thereby preventing pressure from being applied to the train wheel teeth and arbor pivots.
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