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经营范围
发明名称
DRILLING RIG
摘要
申请公布号
SU891907(A1)
申请公布日期
1981.12.23
申请号
SU19802914690
申请日期
1980.04.23
申请人
GORSHKOVA NADEZHDA G,SU;BOBROV OLEG,SU;KOVALEV ANATOLIJ D,SU;KISELEV IVAN P,SU
发明人
GORSHKOVA NADEZHDA G,SU;BOBROV OLEG I,SU;KOVALEV ANATOLIJ D,SU;KISELEV IVAN P,SU
分类号
E21B7/02;E21B15/00;(IPC1-7):E21C11/02;E21C1/00
主分类号
E21B7/02
代理机构
代理人
主权项
地址
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