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发明名称
摘要
申请公布号
JPS5541508(B2)
申请公布日期
1980.10.24
申请号
JP19740006353
申请日期
1974.01.12
申请人
发明人
分类号
H01J7/22;H01J17/22;H01J17/49
主分类号
H01J7/22
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