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发明名称
DOWNHOLE TOOL
摘要
申请公布号
GB9204910(D0)
申请公布日期
1992.04.22
申请号
GB19920004910
申请日期
1992.03.05
申请人
LEDGE 101 LIMITED
发明人
分类号
E21B7/06;E21B17/10;E21B44/00
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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