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经营范围
发明名称
Rotary machine
摘要
申请公布号
US2032732(A)
申请公布日期
1936.03.03
申请号
US19340712385
申请日期
1934.02.21
申请人
THE NATIONAL SUPERIOR COMPANY
发明人
ZERBE LEWIS EMANUEL
分类号
E21B3/04
主分类号
E21B3/04
代理机构
代理人
主权项
地址
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