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Thus we put forword to apply Push pull ventilation device to dust control welding roof.
因而提出了将吹吸式通风装置用于棚板焊接烟尘控制上。
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Poor attic ventilation can cause damage to a roof structure.
阁楼通风不畅将导致屋面结构的损损。
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Poor attic ventilation can cause damage to a roof structure.
阁楼通风不畅将导致屋面结构的损损。
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