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发明名称
ELECTRON TUBE
摘要
申请公布号
CA481892(A)
申请公布日期
1952.03.25
申请号
CAD481892
申请日期
申请人
LOUIS H. CROOK
发明人
LOUIS H. CROOK
分类号
主分类号
代理机构
代理人
主权项
地址
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