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发明名称
DEVICE FOR PROPORTIONAL ELECTRICAL CONTROL
摘要
申请公布号
CA517208(A)
申请公布日期
1955.10.04
申请号
CAD517208
申请日期
申请人
N.V. PHILIPS GLOEILAMPENFABRIEKEN
发明人
HERMANUS J. ROOSDORP
分类号
主分类号
代理机构
代理人
主权项
地址
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