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发明名称
FILTER FOR BOREHOLES
摘要
申请公布号
SU1465548(A1)
申请公布日期
1989.03.15
申请号
SU19864168517
申请日期
1986.12.29
申请人
V PROEKTNO-IZYSKATELSKIJ NII "GIDROPROEKT" IM.S.YA.ZHUKA
发明人
PARFIYANOVICH VLADIMIR A,SU
分类号
E21B43/08
主分类号
E21B43/08
代理机构
代理人
主权项
地址
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