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经营范围
发明名称
Vacuum pump with expanding liquid spiral
摘要
申请公布号
US2633290(A)
申请公布日期
1953.03.31
申请号
US19500161766
申请日期
1950.05.13
申请人
SCHAEFER HENRY G;PHILIP BAUMEISTER
发明人
SCHAEFER HENRY G.;BAUMEISTER PHILIP
分类号
F04D1/12;F04D1/14;F04D17/18
主分类号
F04D1/12
代理机构
代理人
主权项
地址
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