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经营范围
发明名称
ELECTROACOUSTIC TRANSDUCER
摘要
申请公布号
GB1546521(A)
申请公布日期
1979.05.23
申请号
GB19760031991
申请日期
1976.07.30
申请人
FRANCE MINISTER OF ARMED FORCES
发明人
分类号
H04R1/38;H04R17/02;(IPC1-7):H04R17/00;H04R1/32
主分类号
H04R1/38
代理机构
代理人
主权项
地址
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