The control channel within this multiplex is the so-called BAS position in each frame.
此多路复用信道内的控制信道是每帧中的所谓的BAS位置。
Frame: plate type channel steel welded with green paint color. Surface.
机架：板型槽钢与钢板焊接而成。表面油漆颜色为绿色。
The traction mechanism is composed of a connection support frame and a channel steel frame;
牵引机构由连接支架和槽钢架组成；
The traction mechanism is composed of a connection support frame and a channel steel frame;
牵引机构由连接支架和槽钢架组成；
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