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发明名称
Perfectionnements aux appareils de décharge électrique à vapeur métallique
摘要
申请公布号
FR675783(A)
申请公布日期
1930.02.14
申请号
FRD675783
申请日期
1929.05.25
申请人
发明人
FREEDMAN PAUL
分类号
H01J17/50
主分类号
H01J17/50
代理机构
代理人
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