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经营范围
发明名称
HALBLEITERMIKROPHON
摘要
申请公布号
DE2002778(B2)
申请公布日期
1972.01.20
申请号
DE19702002778
申请日期
1970.01.19
申请人
发明人
分类号
H04R23/00;(IPC1-7):H04R23/00
主分类号
H04R23/00
代理机构
代理人
主权项
地址
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