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发明名称
Gruppenbohrer für Gesteinsbohrungen
摘要
申请公布号
CH401873(A)
申请公布日期
1965.11.15
申请号
CH19630004494
申请日期
1963.04.09
申请人
INGERSOLL-RAND COMPANY
发明人
HEINZ KURT,EWALD;W. ADAMS,JOHN
分类号
E21B4/16;E21B10/40
主分类号
E21B4/16
代理机构
代理人
主权项
地址
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