所以，通风管道质量是很重要的。 。

Therefore, ventilation pipe quality is very important.

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通风管道是通风系统的重要组成部分。

Ventilation pipe is vital part of ventilation system.

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局部洁净区的送风管道系统。

Supply air duct system for local clean zones.

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可指定送风管道或回风管道。

Supply or return duct can be specified.

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送风或回风管道部分。

Supply or return duct section.

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附加送风管道部分。

Additional supply duct section.

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请装上通风管道。

Please fit the ventilation ducts.

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回风管道部分。

Return air duct section.

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本文对横流风机式谷物脱粒机排风管道的形状进行了研究。

In this paper, the shape of the air exit of cross-fan grain thresher was studied.

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钻孔机在一个密封的通风管道前受阻，而这个管道离矿工们还很远。

The drill may have hit a sealed shaft, away from the miners.

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钻孔机在一个密封的通风管道前受阻，而这个管道离矿工们还很远。

The drill may have hit a sealed shaft, away from the miners.

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