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发明名称
摘要
申请公布号
PL94395(B1)
申请公布日期
1977.07.30
申请号
PL19740174164
申请日期
1974.09.18
申请人
发明人
分类号
H01J61/44;(IPC1-7):H01J61/44
主分类号
H01J61/44
代理机构
代理人
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地址
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