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发明名称
Means and method of removing pipe from wells
摘要
申请公布号
US1830207(A)
申请公布日期
1931.11.03
申请号
US19310524238
申请日期
1931.03.21
申请人
MUELLER ROBERT A
发明人
MUELLER ROBERT A.
分类号
E21B31/16;E21B31/20
主分类号
E21B31/16
代理机构
代理人
主权项
地址
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