The material comprises a channel longitudinally extending and closing to the edge of a film, and the channel extending along the whole length direction of the film without interruption.
该材料包括纵向延伸且靠近膜的边缘的通道，该通道在该膜的整个长度方向延伸而没有中断。
The material comprises a channel longitudinally extending and closing to the edge of a film, and the channel extending along the whole length direction of the film without interruption.
该材料包括纵向延伸且靠近膜的边缘的通道，该通道在该膜的整个长度方向延伸而没有中断。
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