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发明名称
LAUTSPRECHERMEMBRAN
摘要
申请公布号
DE2444718(B2)
申请公布日期
1977.02.10
申请号
DE19742444718
申请日期
1974.09.19
申请人
发明人
分类号
H04R7/02;H04R19/00;(IPC1-7):H04R7/00
主分类号
H04R7/02
代理机构
代理人
主权项
地址
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