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发明名称
Аппарат для измерения углов отклонения от вертикали и азимутов в бурящихся и эксплоатируюшихся скважинах
摘要
申请公布号
SU20609(A1)
申请公布日期
1931.05.31
申请号
SU19290059352
申请日期
1929.11.30
申请人
PISAKOV V.G.
发明人
PISAKOV V.G.
分类号
E21B47/022
主分类号
E21B47/022
代理机构
代理人
主权项
地址
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