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发明名称
CORE DRILL BIT
摘要
申请公布号
SU1353884(A1)
申请公布日期
1987.11.23
申请号
SU19854000430
申请日期
1985.10.10
申请人
VNII BUROVOJ TEKHNIKI
发明人
BARABASHKIN IGOR I,SU;KUNTSYAK YAROSLAV V,SU;GAVRILOV YAROSLAV S,SU
分类号
E21B10/06
主分类号
E21B10/06
代理机构
代理人
主权项
地址
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