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发明名称
摘要
申请公布号
JPS6244451(Y2)
申请公布日期
1987.11.24
申请号
JP19810015345U
申请日期
1981.02.05
申请人
发明人
分类号
H01J37/20;(IPC1-7):H01J37/20
主分类号
H01J37/20
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