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发明名称
Frequency measuring circuits
摘要
申请公布号
US1864543(A)
申请公布日期
1932.06.28
申请号
US19270172147
申请日期
1927.03.02
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
HORTON JOSEPH W.
分类号
G01R23/00
主分类号
G01R23/00
代理机构
代理人
主权项
地址
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