No. As long as the venting pipe is properly sealed with silicone glue, there will be no unpleasant odours in the room.
没有。只要排气管能用硅胶密封好，室内就不会有任何怪味。
It is widely used at venting pipe and air-blower outlet in building material, glass, mining, power, light industry and papermaking departments. It adjusts flow in pipe by different working conditions.
适用于建材、玻璃、矿山、电力、轻工、造纸等行业的风机出口及通风管道，对管路中流量根据工况的不同需要进行调节。
This valve is widely used in the pipe system such as venting and environment protection in building material, glass, mining, power, light industry and papermaking departments.
角行程电动蝶阀，普遍适用于建材、玻璃、矿山、电力、轻工、造纸等行业的通风、环保工程等管道系统中。
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