Concrete pole has interposed threaded bushes for fastening extension arm, which holds overhead contact wire

摘要

The concrete pole has interposed threaded bushes for fastening an extension arm, which holds an overhead contact wire. The multiple threaded bushes are inserted and are fastened to the threaded bushes anchor disks, in which the arm is fixed in varying position. A threaded bush is fitted at the circular face of a hollow tubular pole body for fastening a support for a wire line.