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发明名称
DRILL BIT
摘要
申请公布号
SU1379447(A1)
申请公布日期
1988.03.07
申请号
SU19853967417
申请日期
1985.10.10
申请人
VNII BUROVOJ TEKHNIKI
发明人
ZAJTSEV ALEKSANDR V,SU;MIKHALCHUK ALEKSANDR B,SU;SUKMANOV GENNADIJ I,SU;URUMYAN RAFIK U,SU;CHUDAKOV ARNOLD I,SU;BELOBORODOV LEONID I,SU
分类号
E21B10/52
主分类号
E21B10/52
代理机构
代理人
主权项
地址
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