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发明名称
Regelbarer elektrischer Widerstand
摘要
申请公布号
DE661515(C)
申请公布日期
1938.06.20
申请号
DE1932B155236D
申请日期
1932.04.13
申请人
KARL BIERMANN
发明人
分类号
H01C10/48
主分类号
H01C10/48
代理机构
代理人
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