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发明名称
Magnetic focusing structure for electron beams
摘要
申请公布号
US2681421(A)
申请公布日期
1954.06.15
申请号
US19520274785
申请日期
1952.03.04
申请人
GENERAL ELECTRIC COMPANY
发明人
GETHMANN RICHARD B.
分类号
H01J29/68
主分类号
H01J29/68
代理机构
代理人
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地址
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