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发明名称
Tube and system for electron discharges
摘要
申请公布号
US2072979(A)
申请公布日期
1937.03.09
申请号
US19300448613
申请日期
1930.04.30
申请人
BERTHA L. CORDES
发明人
CORDES BERTHA L.
分类号
H01J3/02
主分类号
H01J3/02
代理机构
代理人
主权项
地址
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