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发明名称
摘要
申请公布号
NL7005511(A)
申请公布日期
1970.10.20
申请号
NL19700005511
申请日期
1970.04.16
申请人
发明人
分类号
H01J31/15;(IPC1-7):H01J21/10
主分类号
H01J31/15
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代理人
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地址
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