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发明名称
DOWNHOLE SHUTOFF VALVE
摘要
申请公布号
SU1543050(A1)
申请公布日期
1990.02.15
申请号
SU19874318026
申请日期
1987.10.19
申请人
OSOBOE K BYURO PO PROEKTIROVANIYU NEFTEGAZODOBYVAYUSHCHIKH MASHIN OBORUDOVANIYA
发明人
AKHMEDOV KHIKMET YU,SU
分类号
E21B34/06
主分类号
E21B34/06
代理机构
代理人
主权项
地址
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