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发明名称
摘要
申请公布号
JPS57140067(U)
申请公布日期
1982.09.02
申请号
JP19810026436U
申请日期
1981.02.25
申请人
发明人
分类号
H01J29/50;(IPC1-7):H01J29/50
主分类号
H01J29/50
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代理人
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