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发明名称
Приспособление для соединения штанги с буром при ударном бурении
摘要
申请公布号
SU111754(A1)
申请公布日期
1957.11.30
申请号
SU19530576255
申请日期
1953.04.11
申请人
NIZOVKIN G.A.;UBOZHENKO B.V.
发明人
NIZOVKIN G.A.;UBOZHENKO B.V.
分类号
E21B17/02
主分类号
E21B17/02
代理机构
代理人
主权项
地址
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