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发明名称
APPARATUS FOR DRILLING HOLES
摘要
申请公布号
SU735720(A1)
申请公布日期
1980.05.25
申请号
SU19772536574
申请日期
1977.10.24
申请人
KY VNII STROITELNOGO DOROZHNOGO MASHINOSTROENIYA
发明人
FEDKO VALERIJ N,SU
分类号
E21B27/00;(IPC1-7):E02D17/14
主分类号
E21B27/00
代理机构
代理人
主权项
地址
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