Hd insulators and overhead line hardware . metal fittings . double horizontal brackets 架空线路用绝缘子和器材.金具.双水平托架
2.
Hs insulators and overhead line hardware . metal fittings . simple horizontal brackets 架空线路用绝缘子和器材.金具.单水平托架
3.
Fixed railway installations . equipment for overhead electric telecommunication and signalling lines . double horizontal bracket with vertical fixing 铁路固定设备.通讯和信号装置架空线路用器材.垂直固定用卧式双托架