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经营范围
发明名称
ELECTRIC DISCONNECTOR OF DRILL STRING
摘要
申请公布号
SU825881(A1)
申请公布日期
1981.04.30
申请号
SU19792788088
申请日期
1979.06.28
申请人
VNII NEFTEPROMYSLOVOJ GEOFIZIKI
发明人
AKHMETZYANOV VAKIL Z,SU;KUZNETSOV GENNADIJ F,SU;SIRAEV ALBERT KH,SU
分类号
E21B47/00;(IPC1-7):E21B47/00
主分类号
E21B47/00
代理机构
代理人
主权项
地址
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