Railway applications - fixed installations - d . c . switchgear - surge arresters and low - voltage limiters for specific use in d . c . systems 铁路设施.固定设备.直流开关装置.直流系统中特殊应用的电涌放电器和低电压限制器
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Railway applications - fixed installations - d . c . switchgear - part 5 : surge arresters and low - voltage limiters for specific use in d . c . systems 铁路设施.固定设备.直流开关装置.第5部分:直流系统专用电涌放电器和低电压限制器
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Railway applications - fixed installations ; d . c . switchgear - part 5 : surge arresters and low - voltage limiters for specific use in d . c . systems ; german version en 50123 - 5 : 2003 铁路设施.固定设备.直流开关装置.第5部分:直流系统专