只有那些由于经年使用 而严重受到磨损、或因任何方式损坏或损失重量的银币继续流通使用；将这些银币出口以及在黄金市场上销售也不值得。
Only those silver coins which were much worn by usage or in any other way defaced or reduced in weight remained in current use; it did not pay to export and to sell them on the bullion market.
智能保护使用12 - 24v汽车或船舶电源时，该灯设有过放保护电压点，可有效保护因过放电而损坏汽车电池。
Intelligent protection of the use of 12-24v car or ship power, the lamp has a protective voltage point, can effectively protect the damaged car battery due to over discharge.
针对部分高速钢刀具在热处理过程中及用户使用时，因早期失效而损坏的原因进行了分析研究。
A study on the reasons why the cutting tools made from high-speed steel materials were damaged easily when used by users.
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