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发明名称
WELL -SEALING ARRANGEMENT
摘要
申请公布号
SU696165(A1)
申请公布日期
1979.11.05
申请号
SU19782606872
申请日期
1978.04.13
申请人
VOSTOCHNYJ NII PO BEZOPASNOSTI RABOT V GORNOJ PROMYSHLENNOSTI
发明人
RYABCHENKO ALEKSANDR S,SU;SEMENOV YURIJ N,SU;BASKAKOV VIKTOR ,SU;LINDENAU IGOR N,SU
分类号
E21F7/00;E21F5/02;(IPC1-7):E21F7/00
主分类号
E21F7/00
代理机构
代理人
主权项
地址
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