Within hole approximate pane type, effective space big, easy to wear light, cable.
内孔近似方格型，有效空间大，便于穿光、电缆。
The third step, the cable soldered to the solder hole.
第三步，把电缆焊接到焊接孔上。
The third step, the cable soldered to the pin hole soldering.
第三步，把电缆焊接到针焊接孔上。
The middle hole is used for cable going through.
中间窗孔供三相电缆穿过。
The middle hole is used for cable going through.
中间窗孔供三相电缆穿过。
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