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

单词	safety pinion
释义	safety pinion noun : a center pinion gear of a watch that unscrews when the mainspring breaks and relieves the pressure on the delicate train wheel teeth and arbor pivots
随便看	formamide formamidine formamido formamido- formanite formant formas format formate formate formation formation formational formationally formation rule formative formatively formativeness formatore formatrix formatter formazan form block form board form class

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