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经营范围
发明名称
Electrostatic transducers
摘要
申请公布号
GB841713(A)
申请公布日期
1960.07.20
申请号
GB19570026989
申请日期
1957.08.27
申请人
MARCEL HERVE
发明人
分类号
G08C19/06
主分类号
G08C19/06
代理机构
代理人
主权项
地址
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