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发明名称
Dispositif pour faire le vide dans les pompes rotatives ou autres systèmes de pompes
摘要
申请公布号
FR718367(A)
申请公布日期
1932.01.23
申请号
FRD718367
申请日期
1931.06.08
申请人
FRANZ OBERASCHER & CO
发明人
分类号
F04D9/06
主分类号
F04D9/06
代理机构
代理人
主权项
地址
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