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经营范围
发明名称
HORIZONTAL HOLE ENLARGING DEVICE
摘要
申请公布号
SU597778(A1)
申请公布日期
1978.03.15
申请号
SU19762389825
申请日期
1976.07.22
申请人
KUZBASSKIJ POLT INSTITUT
发明人
SAFOKHIN MIKHAIL S,SU;MAMETEV LEONID E,SU;BENYUKH NIKOLAJ D,SU;KUZNETSOV VITALIJ ,SU
分类号
E21B7/28;(IPC1-7):E02D17/14
主分类号
E21B7/28
代理机构
代理人
主权项
地址
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