或不用抽气机，而在进气管道有一接高压清洁空气的进气口(4)。

Otherwise, the air exhauster is not necessary, and the air inlet (4) connecting with the high-pressure clean air is arranged in the air inlet pipeline.

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或不用抽气机，而在进气管道有一接高压清洁空气的进气口(4)。

Otherwise, the air exhauster is not necessary, and the air inlet (4) connecting with the high-pressure clean air is arranged in the air inlet pipeline.

youdao