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经营范围
发明名称
Improvements in or relating to discharge tubes using electrons and/or positive ions
摘要
申请公布号
GB460397(A)
申请公布日期
1937.01.25
申请号
GB19360009882
申请日期
1935.04.23
申请人
WALTER ROGOWSKI;FRIEDRICH MALSCH
发明人
分类号
H01J29/48
主分类号
H01J29/48
代理机构
代理人
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