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发明名称
DRILLING FLUID
摘要
申请公布号
GB9106474(D0)
申请公布日期
1991.05.15
申请号
GB19910006474
申请日期
1991.03.27
申请人
BRITISH PETROLEUM COMPANY, THE P.L.C.
发明人
分类号
主分类号
代理机构
代理人
主权项
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