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发明名称
HOLE EXPANSION APPARATUS
摘要
申请公布号
SU1142615(A1)
申请公布日期
1985.02.28
申请号
SU19823421629
申请日期
1982.04.09
申请人
KAZAKHSKIJ POLT I IM.V.I.LENINA
发明人
BURTSEV VIKTOR V,SU;DZHEENBAEV BERIK K,SU;TUYAKBAEV NEGMET T,SU;FEDOROV BORIS V,SU;KHASENBAEV SERIK U,SU;YUDIN ALEKSANDR V,SU;BOBOVICH VIKTOR S,SU
分类号
E21B7/28;E21B10/12;(IPC1-7):E21B7/28
主分类号
E21B7/28
代理机构
代理人
主权项
地址
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