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发明名称
摘要
申请公布号
JPH04135145(U)
申请公布日期
1992.12.16
申请号
JP19910043417U
申请日期
1991.06.11
申请人
发明人
分类号
H01J17/16;H01J17/18;(IPC1-7):H01J17/16
主分类号
H01J17/16
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