按螺纹朝外方向将公螺母装入电线。装入前螺母应被检查过没有刮伤，毛刺。
After ensuring the male coupling nut is free of scratches, nicks and burr, take the nut and insert into the cable with the thread pointing outward.
承包商应于接头安装后一周重新拧紧螺母，并就在轨道最终衬砌和整平前再一次拧紧。
The contractor shall retighten the nuts one week after joint installation and a second time just before final lining and leveling of the track.
使用前一定要确保所有的螺母和螺栓都拧紧。
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