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发明名称
摘要
申请公布号
JPS52140763(U)
申请公布日期
1977.10.25
申请号
JP19760050823U
申请日期
1976.04.20
申请人
发明人
分类号
H01J29/86;H01J31/20;(IPC1-7):H01J29/86
主分类号
H01J29/86
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代理人
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