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经营范围
发明名称
Molecular vacuum pump
摘要
申请公布号
US1942139(A)
申请公布日期
1934.01.02
申请号
US19300504715
申请日期
1930.12.26
申请人
CENTRAL SCIENTIFIC COMPANY
发明人
DUBROVIN JOHN
分类号
F04D17/16
主分类号
F04D17/16
代理机构
代理人
主权项
地址
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