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发明名称
Magnetsystem, insbesondere fuer elektromagnetische Schallgeraete mit drehbar gelagertem, an seinen Enden verjuengtem Anker
摘要
申请公布号
DE568558(C)
申请公布日期
1933.01.24
申请号
DE1926W072691D
申请日期
1926.05.29
申请人
ELECTRICAL RESEARCH PRODUCTS INC.
发明人
分类号
H04R11/00
主分类号
H04R11/00
代理机构
代理人
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