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发明名称
Electron lens
摘要
申请公布号
US2486856(A)
申请公布日期
1949.11.01
申请号
US19480054381
申请日期
1948.10.14
申请人
GENERAL ELECTRIC COMPANY
发明人
LIEBMANN GERHARD
分类号
H01J37/145
主分类号
H01J37/145
代理机构
代理人
主权项
地址
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