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发明名称
Improved means for removing stuck pipe or the like from well bores
摘要
申请公布号
GB468585(A)
申请公布日期
1937.07.08
申请号
GB19360021588
申请日期
1936.08.05
申请人
GEORGE WALTER BOWEN
发明人
分类号
E21B31/12
主分类号
E21B31/12
代理机构
代理人
主权项
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