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发明名称
Устройство для контроля вертикального положения бурового агрегата
摘要
申请公布号
SU90737(A1)
申请公布日期
1950.11.30
申请号
SU19500430391
申请日期
1950.07.22
申请人
MILKOVITSKIJ S.I.;TKACHENKO R.N.
发明人
MILKOVITSKIJ S.I.;TKACHENKO R.N.
分类号
E21B47/022;E21B47/024
主分类号
E21B47/022
代理机构
代理人
主权项
地址
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