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Watchmaking
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在机械钟表传入中国之前,漏壶是
我
国使用最普遍的一种计时器。二十五、眼镜
Before the mechanical clock was imported into China, the clepsydra was the most widely used time-measuring device
(Glasses)
摆轮是手表的主要零件。但由于它的尺寸小,精度要求高,在
我
国手表产业中其合格率较低
The balance wheel is the main part of a wrist watch. However, now its percent of pass is relatively low in our watch industry because of its small size and high precision
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