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经营范围
发明名称
Roots pump
摘要
申请公布号
CH621854(A5)
申请公布日期
1981.02.27
申请号
CH19770006932
申请日期
1977.06.06
申请人
BALZERS AG
发明人
DR. OTTO WINKLER
分类号
F04C18/20;F04C23/00;F04C29/12;(IPC1-7):F04C18/30;C23C13/00;F04C25/00
主分类号
F04C18/20
代理机构
代理人
主权项
地址
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