| 摘要 |
<p>PURPOSE:To provide an overhead electric wire where it is possible to prevent an optical cable from being damaged due to pressing force applied in passing of a metal wheel at the time of twisting or drawing of a wire and to easily constitute an optical complex overhead electric wire. CONSTITUTION:A pilot wire 1 is surrounded by steel twisted wire layers 9, which are surrounded by aluminum twisted wire layers 10. In order to draw in an optical cable, the optical cable is connected to the rear end of the pilot wire 1, and then, the pilot wire 1 is drawn out.</p> |
