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发明名称
ARRANGEMENT FOR PREVENTING A FALL OF PIPE STRING WITH SUBMERSIBLE ELECTRIC PUMP ONTO BOTTOM HOLE
摘要
申请公布号
SU1541373(A1)
申请公布日期
1990.02.07
申请号
SU19874338008
申请日期
1987.12.04
申请人
V NEFTYANOJ NII PO TEKHNIKE BEZOPASNOSTI
发明人
KIRSH BORIS A,SU;VEZIROV CHINGIZ B,SU
分类号
E21B40/00;E21B23/00;E21B31/00;E21B33/03
主分类号
E21B40/00
代理机构
代理人
主权项
地址
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