... 内障，白内障 cataract 内障吸出术 aspiration of cataract; cataract suction; suction extraction 绿内障白内障 cataracta viridis ...
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extraction and suction system 抽吸系统
The gas extraction effects is related to negative pressure of suction.
顶板瓦斯高抽巷的抽采效果与抽放负压直接相关。
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