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发明名称
Procédé pour l'exécution dans le sol de forages s'étendant radialement à un puits, et machine pour la mise en oeuvre de ce procédé
摘要
申请公布号
FR995888(A)
申请公布日期
1951.12.10
申请号
FRD995888
申请日期
1949.09.21
申请人
GEBHARDT & KOENIG, DEUTSCHE SCHACHTBAU GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
发明人
分类号
E03B3/11;E21B7/04
主分类号
E03B3/11
代理机构
代理人
主权项
地址
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