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发明名称
DEVICE FOR DRILLING HOLES HAVING ENLARGED PORTIONS FOR MAKING CAST-IN-PLACE PILES
摘要
申请公布号
SU732449(A1)
申请公布日期
1980.05.05
申请号
SU19772554277
申请日期
1977.12.12
申请人
PK BYURO MINISTERSTVA SELSKOGO STROITELSTVA BRUSS SSR
发明人
BIENKO VLADISLAV N,SU;SOUS VLADIMIR V,SU;SOROKIN VLADIMIR ,SU
分类号
E21B7/28;(IPC1-7):E02D17/14
主分类号
E21B7/28
代理机构
代理人
主权项
地址
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