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发明名称
Sementeringshode for oljebrönner
摘要
申请公布号
NO300653(B1)
申请公布日期
1997.06.30
申请号
NO19890005237
申请日期
1989.12.22
申请人
PUMPTECH NV
发明人
BUISINE, PAUL
分类号
E21B33/05;E21B33/16;(IPC1-7):E21B33/05
主分类号
E21B33/05
代理机构
代理人
主权项
地址
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