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发明名称
TUBING CENTRALISER
摘要
申请公布号
GB2016063(B)
申请公布日期
1982.05.19
申请号
GB19790007258
申请日期
1979.03.01
申请人
KREFT G
发明人
分类号
E21B17/10;(IPC1-7):E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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