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发明名称
ROTARY DRILL BIT
摘要
申请公布号
SU802502(A1)
申请公布日期
1981.02.07
申请号
SU19792744824
申请日期
1979.04.04
申请人
SP K BYURO PO DOLOTAM PROIZVODSTVENNOGO OBEDINENIYA "KUJBYSHEVBURMASH" MINISTERSTVA KHIM NEFTYANOGO MASH SSSR
发明人
AKHTYRSKIJ VLADIMIR V,SU;GARIN EVGENIJ N,SU;YUDIN ALEKSANDR S,SU
分类号
E21B10/16;E21B7/08;(IPC1-7):E21B10/16
主分类号
E21B10/16
代理机构
代理人
主权项
地址
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