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经营范围
发明名称
Improvements in or relating to electro-mechanical impedances
摘要
申请公布号
GB462888(A)
申请公布日期
1937.03.17
申请号
GB19360024812
申请日期
1936.09.11
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
分类号
H03H9/00;H03H9/24;H03H9/54
主分类号
H03H9/00
代理机构
代理人
主权项
地址
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