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发明名称
ARRANGEMENT FOR CONSTRUCTING A GRAVEL FILTER IN WELL
摘要
申请公布号
SU1521865(A1)
申请公布日期
1989.11.15
申请号
SU19874288932
申请日期
1987.07.22
申请人
VNII GIDROGEOLOGII INZHENERNOJ GEOLOGII
发明人
BASHKATOV ALEKSEJ D,SU
分类号
E21B43/04
主分类号
E21B43/04
代理机构
代理人
主权项
地址
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