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发明名称
Improvements relating to electro-magnetic devices
摘要
申请公布号
GB512910(A)
申请公布日期
1939.09.28
申请号
GB19380008515
申请日期
1938.03.19
申请人
HEINRICH LIST
发明人
分类号
H01H50/24
主分类号
H01H50/24
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代理人
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