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发明名称
CONE-AND-BLADE DRILLING BIT
摘要
申请公布号
SU1721210(A1)
申请公布日期
1992.03.23
申请号
SU19864081956
申请日期
1986.05.11
申请人
VNII BUROVOJ TEKHNIKI
发明人
BARABASHKIN IGOR I,SU;VLADISLAVLEV YURIJ E,SU;KUNTSYAK YAROSLAV V,SU;OKULOV ANATOLIJ P,SU
分类号
E21B10/34
主分类号
E21B10/34
代理机构
代理人
主权项
地址
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