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经营范围
发明名称
DOWNHOLE TOOLS
摘要
申请公布号
GB8428004(D0)
申请公布日期
1984.12.12
申请号
GB19840028004
申请日期
1984.11.06
申请人
TESEL PLC;SIE
发明人
分类号
E21B49/10
主分类号
E21B49/10
代理机构
代理人
主权项
地址
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