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发明名称
BIT FOR IMPACT DRILLING
摘要
申请公布号
SU1073428(A1)
申请公布日期
1984.02.15
申请号
SU19813308473
申请日期
1981.04.06
申请人
VNII ZOLOTA REDKIKH METALLOV
发明人
KRYSHCHENKO NIKOLAJ D,SU;PECHENYJ VLADIMIR E,SU;ZAJTSEV VLADIMIR I,SU;KARASIK ISAAK L,SU
分类号
E21B10/36;(IPC1-7):E21B10/36
主分类号
E21B10/36
代理机构
代理人
主权项
地址
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