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发明名称
CRAWLER-MOUNTED DRILLING RIG
摘要
申请公布号
SU1444511(A1)
申请公布日期
1988.12.15
申请号
SU19874221378
申请日期
1987.04.03
申请人
SP K BYURO SAMOKHODNOGO GORNOGO OBORUDOVANIYA
发明人
KVASKOV BORIS N,SU
分类号
E21B7/02
主分类号
E21B7/02
代理机构
代理人
主权项
地址
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