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发明名称
摘要
申请公布号
JPS46682(Y1)
申请公布日期
1971.01.11
申请号
JP19670012765U
申请日期
1967.02.17
申请人
发明人
分类号
(IPC1-7):H01J29/50;H01J3/02;H01J29/48;H01J31/46
主分类号
(IPC1-7):H01J29/50
代理机构
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