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发明名称
Turbine spinning tongs
摘要
申请公布号
US1774752(A)
申请公布日期
1930.09.02
申请号
US19290337306
申请日期
1929.02.04
申请人
DOROTHY KING
发明人
KING ELMER W.
分类号
E21B19/16
主分类号
E21B19/16
代理机构
代理人
主权项
地址
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