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发明名称
Ringkammer-Mikrofon
摘要
申请公布号
DE809314(C)
申请公布日期
1951.07.26
申请号
DE1949I000060
申请日期
1949.10.25
申请人
IBING HANS KURT DIPL.-ING.
发明人
IBING HANS KURT DIPL.-ING.
分类号
H04R21/02
主分类号
H04R21/02
代理机构
代理人
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