Using new dusting institutions, dusting control can be set paper size, dusting time, reduce the volume of powder and air pollution.

采用新款喷粉机构，喷粉控制可设定纸张大小、喷粉时间，减少了粉量和空气污染。

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This paper presents a new idea that adopts the air curtain with large opening and high volume and the auxiliary non-wind wall fans with large opening and high volume.

本文提出了宽口大风量空气幕和宽口大风量无风墙辅扇的新观点。

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Controlled cycle ventilation is a new ventilation system. We could increase the effective volume of wind at work face without increasing the total volume of fresh air in the mine.

受控循环通风是一种新型的通风方式，在不提高矿井总的新鲜风量的同时，就能提高工作面的有效风量。

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