You will also need to hide the front panel's surface layer you created previously, to be able to see the figures you going to trace.
你同样需要将你先前创建的正面的表面隐藏，以便能看到你要描绘的形状。
The surface of separation between the very hot core and the somewhat cooler outer layer is the radiation front.
十分热的芯部和略为冷些的外区之间的分界层就叫做辐射波阵面。
The characteristics of this filter media are that the surface layer adopts microfibre and that the hydro-channels of the filter media's structure are narrow in the front and wide in the back.
该滤料的特点在于表层采用超细纤维层，滤料结构形成的流体通道呈现为前窄后宽。
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