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发明名称
DEVICE FOR ROTARY-PERCUSSION DRILLING
摘要
申请公布号
SU1652530(A1)
申请公布日期
1991.05.30
申请号
SU19894636022
申请日期
1989.01.12
申请人
NOVOCHERKASSKIJ POLT I IM.SERGO ORDZHONIKIDZE;INST GORNOGO DELA IM.A.A.SKOCHINSKOGO
发明人
RAKOV IVAN YA,SU;KRAPIVIN MIKHAIL G,SU;BURENKOV NIKOLAJ N,SU;MIRNYJ SERGEJ G,SU;PETROV NIKOLAJ G,SU
分类号
E21B6/02
主分类号
E21B6/02
代理机构
代理人
主权项
地址
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