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发明名称
DRILLING RIG FOR DRILLING WELLS
摘要
申请公布号
SU956781(A1)
申请公布日期
1982.09.07
申请号
SU19802951451
申请日期
1980.07.01
申请人
CHERENKOV GENNADIJ,SU
发明人
CHERENKOV GENNADIJ I,SU
分类号
E21B15/00;(IPC1-7):E21C11/00
主分类号
E21B15/00
代理机构
代理人
主权项
地址
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