... gas-pressure relay 气压继电器，瓦斯压力继电器 gas-proof 防气的, 防煤气的，防瓦斯的 gas-proof machine 防瓦斯型电机，气密型电机 ...
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最新的HP组件包内含优质的美国瓦茨部件，包括：新型AS-B青铜导气罩和B911S青铜进水阀和防倒流装置组合件。
The new HP package contains quality Watts components … including the new AS-B Bronze Air Scoop and the B911S Combination Bronze Fill Valve and Backflow Preventer.
目的观察喉全切除气、食管分路发音重建防误咽术的效果。
Objective to observe the effect of tracheoesophageal shunt on voice reconstruction after total laryngectomy.
研究表明，洞穴完井是一种很好的增产控砂方式，其推广使用必将为天然气的防、控砂提供一条有效途径。
Cavity completion well is good method in increasing production and controlling sand, and it will become an effective method to control sand through research.
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