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经营范围
发明名称
DRILLING SIDE WALL CORE
摘要
申请公布号
GB8323424(D0)
申请公布日期
1983.10.05
申请号
GB19830023424
申请日期
1983.09.01
申请人
STANDARD OIL CO
发明人
分类号
E21B49/06;(IPC1-7):E21B49/06
主分类号
E21B49/06
代理机构
代理人
主权项
地址
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