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发明名称
Impact tong and spinner
摘要
申请公布号
US2566999(A)
申请公布日期
1951.09.04
申请号
US19490084437
申请日期
1949.03.30
申请人
STANDARD OIL DEVELOPMENT COMPANY
发明人
STONE ALBERT L.
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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