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发明名称
DRILLING RIG FEED MECHANISM
摘要
申请公布号
SU829910(A1)
申请公布日期
1981.05.15
申请号
SU19782694175
申请日期
1978.12.06
申请人
GOJ VLADIMIR L,SU
发明人
GOJ VLADIMIR L,SU
分类号
E21B19/087;E02D7/18;E21B19/083;(IPC1-7):E21C5/04
主分类号
E21B19/087
代理机构
代理人
主权项
地址
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