bimetallic balance
... 数字式石英钟 quartz digital clock 双金属摆轮 Bimetallic Balance 双联擒纵机构 Duplex escapement ...
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他是那个时代最具创造力的制表大师之一，他拥有锁簧式擒纵机构、双金属摆轮以及螺旋游丝的专利。
He was one of the most inventive watchmakers of his day and held patents for a detent escapement, bimetallic balance and helical balance spring.
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