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发明名称
摘要
申请公布号
JPS5548673(B2)
申请公布日期
1980.12.08
申请号
JP19760042255
申请日期
1976.04.13
申请人
发明人
分类号
H01J31/20;H01J29/32
主分类号
H01J31/20
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代理人
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