
【国外标准】 Specification for magnesium-activated nickel for cathodes of electronic tubes and valves
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适用范围:
暂无
标准号:
BS 3504:1962
标准名称:
Specification for magnesium-activated nickel for cathodes of electronic tubes and valves
英文名称:
Specification for magnesium-activated nickel for cathodes of electronic tubes and valves标准状态:
被代替-
发布日期:
1962-05-04 -
实施日期:
出版语种:
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