[机] blank pipe ;
例句:
1、
The vacuum system consists of vacuum pumps, vacuum pipelines, vacuum valves and vacuum measurers.
真空泵 、 空管道 、 空阀门和真空测量头组成了真空系统.
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2、
Objective To summarize the clinical effect of closed empty canal in root cavity therapy.
目的总结根管治疗中空管封闭疗法的临床效果.
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3、
One of the prevalent methods in traffic control is ground holding based on traffic flow management.
交通流量管理的地面等待策略是当前我国空管工作中实际应用的一种方法.
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德国之翼航空公司一架客机于当地时间3月24日在法国南部坠毁，机上150名乘客和机组人员全部遇难。民航部门的消息说，失事客机没有发出求救信号，是空管人员在与客机失去联系后，宣布客机失踪的。French Police and Gendarmerie Alpine res
A Chinese aircraft was forced to delay its landing after two air traffic controllers nodded off, reports said Tuesday, sparking a wave of online anger about airline safety.本周二消息，两名空管打瞌睡导致一架中国飞机被迫延
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