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发明名称
Improvements in or relating to electro-acoustic transducers
摘要
申请公布号
GB867326(A)
申请公布日期
1961.05.03
申请号
GB19570022065
申请日期
1957.07.11
申请人
UNITED INSULATOR COMPANY LIMITED
发明人
ROBINS ROBERT HILL
分类号
B06B1/06
主分类号
B06B1/06
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代理人
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