线柱 meaning in English

spool pin

Insulators composite - distribution line post type
绝缘子复合材料.配线柱型
Insulators - composite - line post type
合成线柱型绝缘子
1 . 5mm , zinc plated post , bakelite , post to post 6 . 5mm , post height 6 . 5mm , 14 x 0 . 7 cm , japan
15线柱,固定最大线径1 . 5mm ,镀锌接柱,电木基板,线柱高
Insulators for overhead lines - composite line post insulators for alternative current with a nominal voltage 1 000 v
架空电线用绝缘子.额定电压为1000v的交流电流用复合线柱绝缘子