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发明名称
GASEOUS ELECTRIC RELAY DEVICE
摘要
申请公布号
CA407821(A)
申请公布日期
1942.10.06
申请号
CAD407821
申请日期
申请人
CANADIAN WESTINGHOUSE COMPANY
发明人
ROBERT FRED HAYES, JR.
分类号
主分类号
代理机构
代理人
主权项
地址
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