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经营范围
发明名称
Improvements in or relating to transducer apparatus
摘要
申请公布号
GB764352(A)
申请公布日期
1956.12.28
申请号
GB19550001497
申请日期
1955.01.18
申请人
FELT AND TARRANT MANUFACTURING COMPANY
发明人
分类号
G11B5/004
主分类号
G11B5/004
代理机构
代理人
主权项
地址
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