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发明名称
摘要
申请公布号
JPS57110849(U)
申请公布日期
1982.07.08
申请号
JP19800188578U
申请日期
1980.12.26
申请人
发明人
分类号
H01J29/18;H01J29/24;H01J31/50;(IPC1-7):H01J29/18
主分类号
H01J29/18
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