回风管道部分。
Fan, pump, air duct, water pipe, vent.
风机，水泵，风道，水管，风口。
Supply air duct system for local clean zones.
局部洁净区的送风管道系统。
All air duct and water duct are not shown in clean room.
所有气喉和水喉在净化室尽量不外露。
The invention discloses an environment protective type double air duct ventilator.
本发明公开了一种环保型双风道吸油烟机。
One of their air - duct has been blocked.
有一条输气管道堵塞了。
One of their air - duct has been blocked.
有一条输气管道堵塞了。
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