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发明名称
DEEP-WELL HYDRAULIC PACKING PISTON
摘要
申请公布号
SU979621(A1)
申请公布日期
1982.12.07
申请号
SU19813258690
申请日期
1981.01.09
申请人
VNII PO KREPLENIYU SKVAZHIN BUROVYM RASTVORAM
发明人
KRAVCHENKO BORIS I,SU;KORNEV GRIGORIJ P,SU;KHUSID LEONID B,SU;RABINOVICH NAUM R,SU
分类号
E21B43/00;(IPC1-7):E21B43/00
主分类号
E21B43/00
代理机构
代理人
主权项
地址
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