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经营范围
发明名称
ELEKTROAKUSTISCHER WANDLER
摘要
申请公布号
DE1437486(B2)
申请公布日期
1971.05.19
申请号
DE19631437486
申请日期
1963.04.30
申请人
发明人
分类号
H01G7/02;H04M1/03;H04R19/01;(IPC1-7):H04R19/00
主分类号
H01G7/02
代理机构
代理人
主权项
地址
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