Fixed railway installations . equipment for overhead electric telecommunication and signalling lines . bracing collars for wooden posts 铁路固定设备.通信和信号装置架空线路器材.木电线杆钭撑卡箍
2.
Fixed railway installations . equipment for overhead telecommunication and signalling lines . bracing collars for reinforced concrete posts 铁路固定装置.通讯和信号装置架空线路用器材.钢筋混凝土电杆支撑卡箍