Wire line with the structure fixed, the laying of the pipes inside wire should be as much change in the ban wire encumbered control of space, can not be avoided - line maintenance pumping.

• 电线管路应与结构进行固定，敷设时应视管内所穿导线数量的多少而变化，禁止导线占满管内空间，避免换线维修时无法抽取。