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经营范围
发明名称
Improvements in or relating to alternating current frequency meters
摘要
申请公布号
GB921263(A)
申请公布日期
1963.03.20
申请号
GB19600011425
申请日期
1960.03.31
申请人
SANGAMO WESTON LIMITED
发明人
分类号
G01R23/02
主分类号
G01R23/02
代理机构
代理人
主权项
地址
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