So in the river, cross the bridge from shelves, on the ground since the construction of skyscrapers and high-rise tower, even in the laying of underground railway, to create an unprecedented miracle.

The cable should be laid according to the route specified in drawings. And while laying, there should be as little cross as possible, and the cables should be arranged orderly.

The route laying-out, longitudinal sections or cross-sections drawing, field data collecting with computer are combined to realize the route survey integration.