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发明名称
摘要
申请公布号
JPS48101078(A)
申请公布日期
1973.12.20
申请号
JP19720032441
申请日期
1972.03.31
申请人
发明人
分类号
H01J31/20;H01J29/50
主分类号
H01J31/20
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