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发明名称
摘要
申请公布号
JPH0797478(B2)
申请公布日期
1995.10.18
申请号
JP19850287730
申请日期
1985.12.23
申请人
发明人
分类号
H01J9/20;H01J9/22;(IPC1-7):H01J9/22
主分类号
H01J9/20
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