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发明名称
ELECTRON EMISSIVE COMPOSITIONS AND METHOD OF APPLICATION
摘要
申请公布号
CA512928(A)
申请公布日期
1955.05.17
申请号
CAD512928
申请日期
申请人
GENERAL ELECTRIC COMPANY
发明人
JAMES A. HAGER
分类号
主分类号
代理机构
代理人
主权项
地址
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