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经营范围
发明名称
WELLBORE CLEANING APPARATUS
摘要
申请公布号
GB8711345(D0)
申请公布日期
1987.06.17
申请号
GB19870011345
申请日期
1987.05.14
申请人
CONOCO INC
发明人
分类号
E21B37/02
主分类号
E21B37/02
代理机构
代理人
主权项
地址
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