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发明名称
PROCEDE ET DISPOSITIF DE FORAGE DE TROUS DANS LE SOL
摘要
申请公布号
BE766014(A1)
申请公布日期
1971.10.20
申请号
BE19710766014
申请日期
1971.04.20
申请人
STENUICK FRERES, FONTAINE L'EVEQUE,
发明人
分类号
E21B21/12;(IPC1-7):E21B/
主分类号
E21B21/12
代理机构
代理人
主权项
地址
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