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发明名称
摘要
申请公布号
JPH0498249(U)
申请公布日期
1992.08.25
申请号
JP19910001556U
申请日期
1991.01.22
申请人
发明人
分类号
H01J23/54;(IPC1-7):H01J23/54
主分类号
H01J23/54
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代理人
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