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发明名称
ELECTROACOUSTIC TRANSDUCER MAGNETIC SYSTEM
摘要
申请公布号
SU664315(A2)
申请公布日期
1979.05.25
申请号
SU19772550489
申请日期
1977.12.05
申请人
MELNIKOV YURIJ A,SU
发明人
MELNIKOV YURIJ A,SU
分类号
H04Q9/02;(IPC1-7):H04Q9/02
主分类号
H04Q9/02
代理机构
代理人
主权项
地址
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