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发明名称
VALVE FOR CEMENTING CASINGS
摘要
申请公布号
SU815263(A1)
申请公布日期
1981.03.23
申请号
SU19792749075
申请日期
1979.04.09
申请人
VNII PO KREPLENIYU SKVAZHIN BUROVYM RASTVORAM
发明人
GUSEV SERGEJ S,SU;KUKSOV ANATOLIJ K,SU;KOMNATNYJ YURIJ D,SU;CHERNENKO ALEKSANDR V,SU;OVECHKIN ALEKSANDR ,SU;ARAKELYAN ALEKSANDR A,SU
分类号
E21B34/00;E21B41/00;(IPC1-7):E21B41/00
主分类号
E21B34/00
代理机构
代理人
主权项
地址
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