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发明名称
FEEDING DEVICE OF DRILLING RIG
摘要
申请公布号
SU1546600(A1)
申请公布日期
1990.02.28
申请号
SU19884444409
申请日期
1988.05.13
申请人
SOSNOVSKOE PROIZV GEOLOGICHESKOE OBEDINENIE
发明人
SOKOLOV YURIJ N,SU
分类号
E21B19/087;E21B3/00
主分类号
E21B19/087
代理机构
代理人
主权项
地址
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