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经营范围
发明名称
Centralizer
摘要
申请公布号
US3379258(A)
申请公布日期
1968.04.23
申请号
US19660535921
申请日期
1966.03.21
申请人
CHARLES W. TURBYFILL
发明人
TURBYFILL CHARLES W.
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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