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发明名称
PACKERS
摘要
申请公布号
GB9126543(D0)
申请公布日期
1992.02.12
申请号
GB19910026543
申请日期
1991.12.13
申请人
SERVICES PETROLIERS SCHLUMBERGER
发明人
分类号
E21B33/127
主分类号
E21B33/127
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