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发明名称
摘要
申请公布号
DE2215849(A1)
申请公布日期
1972.11.09
申请号
DE19722215849
申请日期
1972.03.30
申请人
发明人
分类号
H04R17/10;(IPC1-7):H04R17/00
主分类号
H04R17/10
代理机构
代理人
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地址
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