膜片两侧置有金属板，膜片变形引起的间隔变化将使电容之发生变化。
As by the two sides of the diaphragm metal plate is placed, changes of gap caused by deformation of diaphragm lead to changes of capacitance accordingly.
主动卷收滚轴以可沿板材移动且可主动转动的方式与膜片设置于 板材的同侧。
The active retracting roller is arranged at the same side of the plate together with the membrane in a way of being movable along the plate and being rotatable actively.
从动加热滚轴以可沿板材移动并且可与膜片接触转动的方式与膜片设置于板材的同侧。
The driven heating roller is arranged at the same side of the plate together with the membrane in a way of being movable along the plate and being rotatable by being contacted with the membrane.
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