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发明名称
TESTA DI ROTAZIONE DI UNA COLONNA DI PERFORAZIONE CON INNESTO A FRIZIONE
摘要
申请公布号
ITRM980652(A1)
申请公布日期
2000.04.17
申请号
IT1998RM00652
申请日期
1998.10.16
申请人
GEOMECCANICA S.R.L.
发明人
DI LAURO PIETRO
分类号
E02F;E21B3/02
主分类号
E02F
代理机构
代理人
主权项
地址
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