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经营范围
发明名称
Downhole apparatus
摘要
申请公布号
GB2315082(A)
申请公布日期
1998.01.21
申请号
GB19960014451
申请日期
1996.07.10
申请人
KLAAS JOHANNES * ZWART
发明人
KLAAS JOHANNES * ZWART
分类号
E21B34/10;(IPC1-7):E21B21/10
主分类号
E21B34/10
代理机构
代理人
主权项
地址
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