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发明名称
CATHODE FOR ELECTRON DISCHARGE DEVICES
摘要
申请公布号
CA323652(A)
申请公布日期
1932.06.28
申请号
CAD323652
申请日期
申请人
THE ARCTURUS RADIO TUBE COMPANY
发明人
SAMUEL RUBEN
分类号
主分类号
代理机构
代理人
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