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发明名称
Устройство для автоматического регулирования подачи долота при вращательном бурении скважин двигателями всех родов
摘要
申请公布号
SU37012(A1)
申请公布日期
1934.06.30
申请号
SU19330124246
申请日期
1933.02.10
申请人
SKVORTSOV M.M.
发明人
SKVORTSOV M.M.
分类号
E21B19/08;E21B44/00
主分类号
E21B19/08
代理机构
代理人
主权项
地址
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