| 摘要 |
<p>PURPOSE:To prevent the humming sound of an aerial transmission line due to wind by spirally burying an insulating reinforcing plastic line material with cover in a semiconductive cable contact section, leaving one part of the surface exposed. CONSTITUTION:An insulating reinforcing plastic line material 4 with cover is made by covering an insulating reinforcing core material 2 made of hard plastic consisting of an insulating material such as polypropylene or Kepler fibers with an insulated layer 3 such as of nylon, polypropylene. And, this insulating reinforcing plastic line material 4 with cover is spirally buried in semiconductive wire contact section, leaving one part of the surface 6 exposed. Hereby, the humming sound of an aerial transmission line due to wind can be prevented.</p> |
