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经营范围
发明名称
ROLLER-CUTTER DRILLING BIT
摘要
申请公布号
SU1645435(A1)
申请公布日期
1991.04.30
申请号
SU19884469746
申请日期
1988.08.04
申请人
VNII BUROVOJ TEKHNIKI
发明人
BRAZHENTSEV VLADIMIR P,SU;POZDNYAKOV VIKTOR I,SU;ZABURDAEV ALEKSANDR K,SU
分类号
E21B10/16
主分类号
E21B10/16
代理机构
代理人
主权项
地址
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