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发明名称
Underjordisk apparat
摘要
申请公布号
NO20015593(A)
申请公布日期
2002.01.18
申请号
NO20010005593
申请日期
2001.11.15
申请人
WEATHERFORD/LAMB INC
发明人
SIMPSON, NEIL ANDREW ABERCROMBIE
分类号
E21B23/00;E21B23/10;E21B37/00;F16L55/38;(IPC1-7):E21B
主分类号
E21B23/00
代理机构
代理人
主权项
地址
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