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发明名称
摘要
申请公布号
JPS55168957(U)
申请公布日期
1980.12.04
申请号
JP19790067428U
申请日期
1979.05.18
申请人
发明人
分类号
H01J3/02;H01J1/88;H01J29/50;(IPC1-7):H01J29/50
主分类号
H01J3/02
代理机构
代理人
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