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发明名称
摘要
申请公布号
JP2547509(Y2)
申请公布日期
1997.09.10
申请号
JP19900082637U
申请日期
1990.08.03
申请人
发明人
分类号
H01J31/15;H01J29/94;H01J31/12;(IPC1-7):H01J31/12
主分类号
H01J31/15
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代理人
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