
【国外标准】 Specification. Intrinsically-safe transformers primarily for bell-signalling circuits
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适用范围:
暂无
标准号:
BS 1538:1949
标准名称:
Specification. Intrinsically-safe transformers primarily for bell-signalling circuits
英文名称:
Specification. Intrinsically-safe transformers primarily for bell-signalling circuits标准状态:
被代替-
发布日期:
1949-02-09 -
实施日期:
出版语种:
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