mechanical extraction 机械抽风
mechanical extraction rate 机械排烟速率
mechanical oil extraction 机械采油
mechanical stone extraction 器械取石
mechanical smoke extraction 机械排烟
mechanical shaking extraction 振荡提取
mechanical smoke extraction system 机械排烟系统
extraction mechanical
提取机械
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The Institution of Mechanical Engineers (IMechE) said jobs created by fracking, a form of gas extraction, included chemical, mechanical, civil and structural engineers, operations staff and geologists.
BBC: Fracking could create 'thousands' of engineering jobs
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