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发明名称
Improvements in or relating to microphones
摘要
申请公布号
GB700935(A)
申请公布日期
1953.12.16
申请号
GB19510013939
申请日期
1951.06.12
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
分类号
H04R1/40
主分类号
H04R1/40
代理机构
代理人
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地址
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