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发明名称
DRILLING
摘要
申请公布号
GB2038909(B)
申请公布日期
1983.04.13
申请号
GB19800000014
申请日期
1980.01.02
申请人
COMPAGNIE FRANCAISE DES PETROLES
发明人
分类号
E21B4/02;E21B7/18;E21B10/60;E21B21/00;F03B13/02;(IPC1-7):E21B7/18
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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