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发明名称
DRILL PIPES AND CASINGS UTILIZING MULTI-CONDUIT TUBULARS
摘要
申请公布号
AU600214(B2)
申请公布日期
1990.08.02
申请号
AU19880020085
申请日期
1988.07.27
申请人
PANGAEA ENTERPRISES, INC
发明人
HARRY BAILEY CURLETT
分类号
E21B17/04;E21B17/00;E21B17/18;E21B21/02;E21B21/08;E21B21/12;E21B47/12;F16L39/04;F16L39/06;(IPC1-7):E21B17/02
主分类号
E21B17/04
代理机构
代理人
主权项
地址
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