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发明名称
摘要
申请公布号
JPS6446939(U)
申请公布日期
1989.03.23
申请号
JP19870140926U
申请日期
1987.09.17
申请人
发明人
分类号
H01J29/00;H01J29/89;(IPC1-7):H01J7/26;H01J31/10;H04N5/74
主分类号
H01J29/00
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