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发明名称
SEALING DEVICE TO LOWERING WELL
摘要
申请公布号
SU808593(A2)
申请公布日期
1981.02.28
申请号
SU19792770637
申请日期
1979.05.25
申请人
VNII GIDROMEKHANIZATSII, CAHôTAPHO-TEXHôÚECKôX ô CüE|ôAóÓHÕX CTPOôTEóÓHÕX PA¬OT
发明人
PRIDCHIN GEORGIJ A,SU;KEDROV OLEG G,SU;BOLYACHEVSKIJ BORIS ,SU;NIKOLENKO YURIJ F,SU
分类号
E02D5/54;(IPC1-7):E02D5/54
主分类号
E02D5/54
代理机构
代理人
主权项
地址
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