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发明名称
Tubing slip
摘要
申请公布号
US1797964(A)
申请公布日期
1931.03.24
申请号
US19290367800
申请日期
1929.06.01
申请人
TEXAS IRON WORKS SALES CORPORATION
发明人
PEARCE LOUIS M.
分类号
E21B19/10
主分类号
E21B19/10
代理机构
代理人
主权项
地址
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