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发明名称
APPARATUS FOR & METHOD OF FILLING WELL CASINGS
摘要
申请公布号
GB8808300(D0)
申请公布日期
1988.05.11
申请号
GB19880008300
申请日期
1988.04.08
申请人
WEATHERFORD UK LTD
发明人
分类号
E21B21/08
主分类号
E21B21/08
代理机构
代理人
主权项
地址
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