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发明名称
Vacuum pump
摘要
申请公布号
US3235172(A)
申请公布日期
1966.02.15
申请号
US19640400794
申请日期
1964.10.01
申请人
THE WELCH SCIENTIFIC COMPANY
发明人
DUBROVIN JOHN
分类号
F04C18/344;F04C27/02
主分类号
F04C18/344
代理机构
代理人
主权项
地址
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