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发明名称
Frequency meter
摘要
申请公布号
US2673328(A)
申请公布日期
1954.03.23
申请号
US19500196420
申请日期
1950.11.18
申请人
WESTON ELECTRICAL INSTRUMENT CORPORATION
发明人
GILBERT ROSWELL W.
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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