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发明名称
Method
摘要
申请公布号
GB9911146(D0)
申请公布日期
1999.07.14
申请号
GB19990011146
申请日期
1999.05.14
申请人
DES ENHANCED RECOVERY LIMITED
发明人
分类号
E21B33/035;E21B33/076;E21B34/04;E21B43/12
主分类号
E21B33/035
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