GB/T 25020.3-2016电气化铁路接触网钢支柱第3部分:环形钢管支柱国家标准
英文:Steel pole for pole for overhead contact system of electrified railways—Part 3: Steel tube pole GB/T 25020.3-2016介绍: ...
英文:Steel pole for pole for overhead contact system of electrified railways—Part 3: Steel tube pole GB/T 25020.3-2016介绍: ...