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发明名称
Fremgangsmåte og anordning ved fôringsrör
摘要
申请公布号
NO316183(B1)
申请公布日期
2003.12.22
申请号
NO20020001179
申请日期
2002.03.08
申请人
SANGESLAND, SIGBJOERN
发明人
SANGESLAND, SIGBJOERN
分类号
E21B33/043;(IPC1-7):E21B7/12;E21B7/20
主分类号
E21B33/043
代理机构
代理人
主权项
地址
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