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经营范围
发明名称
COUPLING FOR STEPPED CEMENTING OF HOLES
摘要
申请公布号
SU607951(A1)
申请公布日期
1978.05.25
申请号
SU19762390909
申请日期
1976.07.20
申请人
VNII PO KREPLENIYU SKVAZHIN BUROVYM RASTVORAM
发明人
MISHUCHKIN GENNADIJ K,SU;GAGINA VERA V,SU;VARTANYANTS STEPAN G,SU
分类号
E21B33/14;E21B33/13;(IPC1-7):E21B33/13
主分类号
E21B33/14
代理机构
代理人
主权项
地址
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