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发明名称
Kegelfoermige, kurvenfoermig ausgeschnittene Membran
摘要
申请公布号
DE596530(C)
申请公布日期
1934.05.05
申请号
DED596530D
申请日期
申请人
ERICH NICKEL;ANDOR KIRALY
发明人
分类号
H04R7/26
主分类号
H04R7/26
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代理人
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