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发明名称
DRILLING RIG FEED MECHANISM
摘要
申请公布号
SU1435775(A2)
申请公布日期
1988.11.07
申请号
SU19864190891
申请日期
1986.12.22
申请人
STYUNIN ALEKSANDR A,SU
发明人
STYUNIN ALEKSANDR A,SU
分类号
E21B19/084
主分类号
E21B19/084
代理机构
代理人
主权项
地址
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