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发明名称
BAUGRUPPE ZUR KATODENBEHEIZUNG
摘要
申请公布号
DD338720(A5)
申请公布日期
1992.05.07
申请号
DD19900338720
申请日期
1990.03.06
申请人
发明人
分类号
H01J1/20;(IPC1-7):H01J1/20
主分类号
H01J1/20
代理机构
代理人
主权项
地址
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