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发明名称
摘要
申请公布号
FR2159441(B1)
申请公布日期
1978.12.08
申请号
FR19720039840
申请日期
1972.11.10
申请人
NCR CORP
发明人
分类号
H01J17/49;(IPC1-7):H01J17/00;G09F13/00
主分类号
H01J17/49
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