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。
Fixed railway installations. equipment for overhead telecommunication and signalling lines. plate for securing cross - pieces to 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。
Fixed railway installations. equipment for overhead telecommunication and signalling lines. bracing collars for reinforced concrete posts.
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