Fixed railway equipment . material for telecommunication and signalling overhead lines . rectangular tie bars 铁路固定设备.通信和信号装置架空线路器材.矩形横梁
2.
Fixed railway equipment . material for telecommunication and signalling overhead lines . caps for posts and small pillars 铁路固定设备.通信和信号装置架空线路器材.立柱和标桩用罩
3.
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