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发明名称
摘要
申请公布号
DD112032(A1)
申请公布日期
1975.03.12
申请号
DD19740178454
申请日期
1974.05.13
申请人
发明人
分类号
H01J61/54;H05B41/16;(IPC1-7):H01J61/54
主分类号
H01J61/54
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