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发明名称
Rotary screw pump
摘要
申请公布号
US2527536(A)
申请公布日期
1950.10.31
申请号
US19450593875
申请日期
1945.05.15
申请人
ENGBERG RALPH E
发明人
ENGBERG RALPH E.
分类号
F04C2/107
主分类号
F04C2/107
代理机构
代理人
主权项
地址
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