overhead ground wire（架空地线）是什么意思？音标发音+图解场景

架空地线 /aʊtwˈɒʃ ˈpleɪn/ n

English: overhead ground wire · 架空地线

释义：Conductor that is connected to the ground and attached above the bundles of the overhead lines to protect them from lightning.

这个词出现在以下图解场景（1）