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发明名称
Electron beam apparatus including filament current control means
摘要
申请公布号
GB1148426(A)
申请公布日期
1969.04.10
申请号
GB19670057022
申请日期
1967.12.15
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
分类号
H01J3/02;H01J29/52
主分类号
H01J3/02
代理机构
代理人
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