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发明名称
Messeinrichtung zur Bestimmung von Wechselstromleistungen veraenderlicher Frequenz und veraenderlichen Leistungsfaktors in Brueckenschaltung
摘要
申请公布号
DE550777(C)
申请公布日期
1932.05.19
申请号
DENDATP062249D
申请日期
申请人
ERWIN PAUL
发明人
分类号
G01R21/00
主分类号
G01R21/00
代理机构
代理人
主权项
地址
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