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发明名称
STAGE CEMENTING APPARATUS
摘要
申请公布号
EP0224942(B1)
申请公布日期
1993.03.31
申请号
EP19860201603
申请日期
1986.09.18
申请人
COMPAGNIE DES SERVICES DOWELL SCHLUMBERGER;PUMPTECH N.V.
发明人
BISSONNETTE, HAROLD STEVEN
分类号
E21B33/14;E21B34/14
主分类号
E21B33/14
代理机构
代理人
主权项
地址
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