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发明名称
摘要
申请公布号
FR2319193(B1)
申请公布日期
1979.06.01
申请号
FR19760022264
申请日期
1976.07.21
申请人
HITACHI LTD
发明人
分类号
H01J23/54;(IPC1-7):H01J25/50
主分类号
H01J23/54
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