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发明名称
AUTOMATICALLY-CONTROLLED DRILL PIPE FOR ROTARY DRILL PIPES OF DRILLING RIGS
摘要
申请公布号
SU1748657(A3)
申请公布日期
1992.07.15
申请号
SU19894613403
申请日期
1989.01.18
申请人
SHVING KHYUDRAULIK ELEKTRONIK GMBKH UND KO. (FIRMA)
发明人
MARTIN VIBE,DE;KHAJNTS VALLUSEK,DE
分类号
E21B7/08
主分类号
E21B7/08
代理机构
代理人
主权项
地址
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