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发明名称
摘要
申请公布号
JPH0328644(U)
申请公布日期
1991.03.22
申请号
JP19900068966U
申请日期
1990.06.28
申请人
发明人
分类号
H01J29/04;H01J29/50;(IPC1-7):H01J29/04
主分类号
H01J29/04
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代理人
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