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发明名称
APPARATUS FOR EXPANDING BOREHOLE
摘要
申请公布号
SU1384705(A1)
申请公布日期
1988.03.30
申请号
SU19864042875
申请日期
1986.02.21
申请人
PROIZVODSTVENNO-TEKHNOLOGICHESKOE OB "PROGRESS";URALSKIJ POLT I IM.S.M.KIROVA
发明人
ZHIDKOV OLEG N,SU;PINKHASIK ALEKSANDR M,SU;PAVLOV VIKTOR V,SU;ALEKSEEV BORIS G,SU
分类号
E21B7/24;E21B7/28;E21B7/30
主分类号
E21B7/24
代理机构
代理人
主权项
地址
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