G insulators and fittings for overhead lines . bushes for terminal insulators 架空線路用絕緣子和配件.接線端子絕緣子襯套
Av insulators and fittings for overhead lines . glass insulators for voltages lower than 1000 v . terminal insulators 架空線路用絕緣子和配件.電壓低于1000 v的玻璃絕緣子.接線端子絕緣子
Ac insulators and fittings for overhead lines . insulators of ceramic material for voltages lower than 1000 volts . terminal insulators 架空線路用絕緣子和配件.電壓低于1000 v瓷料絕緣子.接線端子絕緣子