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发明名称
FILM CONTROLLED CONTACT DEVICE
摘要
申请公布号
CA297052(A)
申请公布日期
1930.01.28
申请号
CAD297052
申请日期
申请人
THE CANADIAN GENERAL ELECTRIC COMPANY LIMITED
发明人
JACOB TSCHOOP
分类号
主分类号
代理机构
代理人
主权项
地址
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