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经营范围
发明名称
Improvements in or relating to electro-acoustic transducers
摘要
申请公布号
GB1027951(A)
申请公布日期
1966.05.04
申请号
GB19650000955
申请日期
1965.01.08
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
分类号
H04R1/22
主分类号
H04R1/22
代理机构
代理人
主权项
地址
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