单词：mechanical means
mechanical means的用法和样例：
例句
- Rubber faced or mechanical flanges are not recommended.建议不要使用橡胶表面或机械法兰。
- Mechanical comminution and chemical methods were all used in China and India antiquity for making gold powder.古代中国和印度采用机械法和化学法制造金粉，其金粉技术和应用都有久远的历史，但也有若干差异。
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