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发明名称
CROWN BIT FOR DRILLING WITH CONTINUOUS CORE RECOVERY
摘要
申请公布号
SU1726723(A1)
申请公布日期
1992.04.15
申请号
SU19904803691
申请日期
1990.03.19
申请人
PROIZV GEOLOGICHESKOE OB "YAKUTSKGEOLOGIYA"
发明人
MELNICHUK IGOR P,SU;PINCHUK NIKOLAJ P,SU;PLYUSNIN ANATOLIJ A,SU;PANIN NIKOLAJ M,SU;DUMKIN LEV N,SU;PERETYAKA PAVEL V,SU
分类号
E21B10/02
主分类号
E21B10/02
代理机构
代理人
主权项
地址
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