Damper: both gas flow regulating button and wind board are high grade PP material, connected with 304 stainless steel bar, manually adjust the outside valve knob, control air flow.
气流调节阀：气流调节扭与挡风板均为高密度PP材质，用304不锈钢方棒连接，手动调节外部阀门旋钮，控制气流量。
The damper plate rotates around an axis rod to control the flow of air through the vent pipe.
这个风挡通过中心轴控制旋转来让通过排气管的空气流动起来的。
The damper plate rotates around an axis rod to control the flow of air through the vent pipe.
这个风挡通过中心轴控制旋转来让通过排气管的空气流动起来的。
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