
【国外标准】 Alternating-current line relays (2-element, 3-position) for railway signalling purposes.
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适用范围:
暂无
标准号:
BS 561:1934
标准名称:
Alternating-current line relays (2-element, 3-position) for railway signalling purposes.
英文名称:
Alternating-current line relays (2-element, 3-position) for railway signalling purposes.标准状态:
被代替-
发布日期:
1934-07-23 -
实施日期:
出版语种:
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