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发明名称
Improvements in and relating to transducers
摘要
申请公布号
GB760787(A)
申请公布日期
1956.11.07
申请号
GB19510025352
申请日期
1951.10.30
申请人
STANLEY KELLY
发明人
分类号
H04R1/16;H04R17/04;H04R17/06
主分类号
H04R1/16
代理机构
代理人
主权项
地址
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