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发明名称
Combined impeller and closure
摘要
申请公布号
US2974731(A)
申请公布日期
1961.03.14
申请号
US19580739230
申请日期
1958.06.02
申请人
JOHN SPARGO
发明人
MADER EMIL A.
分类号
F04D29/36
主分类号
F04D29/36
代理机构
代理人
主权项
地址
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