钟表玻璃及钟锤（按其构成材料归类）；

Clock or watch glasses or weights (classified according to their constituent material);

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在1500年初用发条代替钟锤来驱动时钟发明后不久，就出现了第一批表。

The first watches appeared shortly after 1500, when the mainspring was invented as a replacement for weights in driving clocks.

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但是，太可惜了，主吊钟又被撞裂了，人们还不得不把裂缝弄得更大些以防止震动。现在所使用的钟锤，其重量只有190公斤。

But Alas. again the main bell cracked, and they had to file the fissure wider to prevent vibration. The hammer now in use weighs only 190kg.

youdao

但是，太可惜了，主吊钟又被撞裂了，人们还不得不把裂缝弄得更大些以防止震动。现在所使用的钟锤，其重量只有190公斤。

But Alas. again the main bell cracked, and they had to file the fissure wider to prevent vibration. The hammer now in use weighs only 190kg.

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