| 摘要 |
PCT No. PCT/GB91/01945 Sec. 371 Date Apr. 21, 1993 Sec. 102(e) Date Apr. 21, 1993 PCT Filed Nov. 6, 1991 PCT Pub. No. WO92/08237 PCT Pub. Date May 14, 1992The present invention relates to a barrier for an insulator having a central portion or stem with a plurality of sheds extending therefrom. The barrier is, in use, located between adjacent sheds of the insulator and includes a sheet of dielectric material having one or more discontinuities in its surface. The discontinuities can be in the form of holes in the surface or in the form of a joint between cut edges of the barrier. |
