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发明名称
APPARATUS FOR EXPANDING BOREHOLES
摘要
申请公布号
SU1323725(A1)
申请公布日期
1987.07.15
申请号
SU19864022009
申请日期
1986.02.12
申请人
KUZBASSKIJ POLT INSTITUT
发明人
SAFOKHIN MIKHAIL S,SU;BOGOMOLOV IGOR D,SU;NACHEV KONSTANTIN V,SU;GAVRILOV OLEG P,SU;ERIN OLEG I,SU;ERMOLAEV VLADIMIR S,SU
分类号
E21D3/00;E21B7/28
主分类号
E21D3/00
代理机构
代理人
主权项
地址
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