Electric portable ventilation fans 轻便式电动通风机
Portable Explosion proof ventilation fans 移动式防爆通风机
Engine room ventilation fans 机舱风机
Civilian Ventilation Fans Series 民用换气扇系列
Industrial Ventilation Fans Series 工业换气扇系列
Pneumatic portable ventilation fans 移动式气动通风机
Tanks are equipped with functional U. V. lights and ventilation fans.
储罐装备有紫外灯和通风扇。
When radon ventilation fans are added radon levels can even be reduced further.
当增加氡换气扇时,可进一步降低氡的水平。
Even powerful ventilation fans don't effectively remove secondhand smoke from the air.
看似功效强大的通风设备并不能有效清除二手烟。
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