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发明名称
DEVICE FOR SECURING WELLS
摘要
申请公布号
SU1413237(A1)
申请公布日期
1988.07.30
申请号
SU19853874418
申请日期
1985.03.25
申请人
VNII GIDROTEKH MELIORAT
发明人
KRASNOSHCHEKOV GEORGIJ M,SU;BITYUTSKIJ VIKTOR I,SU
分类号
E21B33/13
主分类号
E21B33/13
代理机构
代理人
主权项
地址
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