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发明名称
TREPAN DE FORAGE MONOBLOC ROTATIF
摘要
申请公布号
FR2609750(B1)
申请公布日期
1989.04.07
申请号
FR19870000822
申请日期
1987.01.19
申请人
VENNIN HENRI
发明人
分类号
E21B10/56;E21B10/567;E21B10/62;E21B10/633;F16B3/00;(IPC1-7):E21B10/62;E21B10/46
主分类号
E21B10/56
代理机构
代理人
主权项
地址
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