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发明名称
摘要
申请公布号
JPS495381(B1)
申请公布日期
1974.02.06
申请号
JP19690043427
申请日期
1969.05.27
申请人
发明人
分类号
H01J9/02;H01J17/49
主分类号
H01J9/02
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