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经营范围
发明名称
BORING BIT
摘要
申请公布号
SU924339(A1)
申请公布日期
1982.04.30
申请号
SU19803213034
申请日期
1980.12.02
申请人
DN OTDEL I MINERALNYKH RESURSOV
发明人
BOLSHAKOV VLADISLAV V,SU;AGESHIN MIKHAIL S,SU;LITVIN NIKOLAJ A,SU;SOROKIN VLADIMIR I,SU
分类号
E21B10/62;(IPC1-7):E21B10/62
主分类号
E21B10/62
代理机构
代理人
主权项
地址
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