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发明名称
摘要
申请公布号
JPS5870664(U)
申请公布日期
1983.05.13
申请号
JP19810164846U
申请日期
1981.11.06
申请人
发明人
分类号
H01J31/28;H01J29/86;H01J31/38;(IPC1-7):H01J29/86
主分类号
H01J31/28
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代理人
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