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发明名称
ELECTROMAGNETIC TRANSDUCER
摘要
申请公布号
GB1380928(A)
申请公布日期
1975.01.15
申请号
GB19710059724
申请日期
1971.12.22
申请人
MAGNEPAN INC
发明人
分类号
H04R9/04;(IPC1-7):H04R9/00
主分类号
H04R9/04
代理机构
代理人
主权项
地址
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