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经营范围
发明名称
CEMENTING WELL-HEAD DEVICE
摘要
申请公布号
SU817210(A2)
申请公布日期
1981.03.30
申请号
SU19782632138
申请日期
1978.06.19
申请人
VNII PO KREPLENIYU SKVAZHIN BUROVYM RASTVORAM
发明人
KRYLOV VIKTOR ,SU;FURMANOV ALEKSANDR N,SU
分类号
E21B33/05;(IPC1-7):E21B33/05
主分类号
E21B33/05
代理机构
代理人
主权项
地址
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