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发明名称
Improvements in or relating to electric negative resistances
摘要
申请公布号
GB368770(A)
申请公布日期
1932.02.29
申请号
GB19300025594
申请日期
1930.08.27
申请人
ERICH HABANN
发明人
分类号
H01C7/10
主分类号
H01C7/10
代理机构
代理人
主权项
地址
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