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经营范围
发明名称
OFFSHORE WELL WORKOVER METHOD
摘要
申请公布号
US3513911(A)
申请公布日期
1970.05.26
申请号
USD3513911
申请日期
1968.05.24
申请人
SHELL OIL CO.
发明人
WILLIAM H. PETERSEN
分类号
E21B33/038;E21B33/035;E21B41/10;E21B43/013;(IPC1-7):E21B7/12;E21C19/00
主分类号
E21B33/038
代理机构
代理人
主权项
地址
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