
【国外标准】 Railway mechanical signalling apparatus (signal posts semaphore signals, fittings and connections, and point connections and fittings.)
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适用范围:
暂无
标准号:
BS 689:1936
标准名称:
Railway mechanical signalling apparatus (signal posts semaphore signals, fittings and connections, and point connections and fittings.)
英文名称:
Railway mechanical signalling apparatus (signal posts semaphore signals, fittings and connections, and point connections and fittings.)标准状态:
被代替-
发布日期:
1936-07-20 -
实施日期:
出版语种:
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