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发明名称
Improvements in and relating to transducers
摘要
申请公布号
GB756546(A)
申请公布日期
1956.09.05
申请号
GB19520010884
申请日期
1952.04.30
申请人
SIEGFRIED KLEIN
发明人
分类号
H04R23/00
主分类号
H04R23/00
代理机构
代理人
主权项
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