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经营范围
发明名称
Well tool control mechanism
摘要
申请公布号
US3135329(A)
申请公布日期
1964.06.02
申请号
US19590826841
申请日期
1959.07.13
申请人
CONRAD MARTIN B
发明人
CONRAD MARTIN B.
分类号
E21B33/129
主分类号
E21B33/129
代理机构
代理人
主权项
地址
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