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发明名称
Гидравлическое устройство для вращательного бурения
摘要
申请公布号
SU43869(A1)
申请公布日期
1935.08.31
申请号
SU19340150233
申请日期
1934.07.01
申请人
EPSHTEJN E.F.
发明人
EPSHTEJN E.F.
分类号
E21B3/02
主分类号
E21B3/02
代理机构
代理人
主权项
地址
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