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经营范围
发明名称
Vacuum pump
摘要
申请公布号
US2463458(A)
申请公布日期
1949.03.01
申请号
US19470746203
申请日期
1947.05.06
申请人
JEANETTE LLOYD
发明人
FREYN CARL
分类号
F04B43/00
主分类号
F04B43/00
代理机构
代理人
主权项
地址
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