The vent plate includes a concave deforming portion, a protrusion formed in the center of the deforming portion, and a notch formed around the deforming portion.
排放板包括凹入的变形部分、形成在变形部分的中心的突起和围绕变 形部分形成的凹槽。
Each damper is a short sheet metal vent pipe fitted with a circular damper plate within the vent pipe, and attached to a square anchor plate.
每一个节气阀都是由一个短的金属片的排气管再安装上圆形的风挡，然后粘上真方形的固定板制成的。
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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