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发明名称
摘要
申请公布号
JPS5996752(U)
申请公布日期
1984.06.30
申请号
JP19820193501U
申请日期
1982.12.21
申请人
发明人
分类号
H01J7/18;H01J7/22;H01J9/38;H01J17/16;H01J29/89
主分类号
H01J7/18
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