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发明名称
Perfectionnements concernant les tubes à décharge électrique
摘要
申请公布号
FR757620(A)
申请公布日期
1933.12.29
申请号
FRD757620
申请日期
1933.06.26
申请人
发明人
HARRIES JOHN HENRY OWEN
分类号
H01J21/12
主分类号
H01J21/12
代理机构
代理人
主权项
地址
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