英语词汇“motor barrel”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	motor barrel
释义	motor barrel noun : the mainspring unit in watches that have the main wheel detached from the barrel but turning as a unit with the barrel arbor to eliminate strain on the main wheel teeth if the mainspring should break — compare going barrel
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