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发明名称
Dispositif électrique convenant à la mesure de différences de potentiel
摘要
申请公布号
FR679550(A)
申请公布日期
1930.04.14
申请号
FRD679550
申请日期
1929.07.30
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
G01R19/00
主分类号
G01R19/00
代理机构
代理人
主权项
地址
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