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发明名称
FremgangsmÕte og anordning for Õ forhindre skade pÕ brönnutstyr
摘要
申请公布号
NO20012477(A)
申请公布日期
2002.11.22
申请号
NO20010002477
申请日期
2001.05.21
申请人
BJOERNSTAD, THOR
发明人
BJOERNSTAD, THOR
分类号
E21B;E21B31/08;(IPC1-7):E21B31/08
主分类号
E21B
代理机构
代理人
主权项
地址
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