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发明名称
摘要
申请公布号
FR2092463(A5)
申请公布日期
1972.01.21
申请号
FR19710010264
申请日期
1971.03.11
申请人
IBM
发明人
分类号
H01J19/66;H01T4/08;(IPC1-7):H01T3/00
主分类号
H01J19/66
代理机构
代理人
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