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发明名称
ARRANGEMENT FOR DRILLING LARGE-DIAMETER VERTICAL HOLES WITH PERMANENT LINING
摘要
申请公布号
SU1509534(A1)
申请公布日期
1989.09.23
申请号
SU19874297709
申请日期
1987.08.19
申请人
KOTLYAROV ALEKSANDR M,SU;KUZMENKO MIKHAIL M,SU;MARKOV YURIJ M,SU
发明人
KOTLYAROV ALEKSANDR M,SU;KUZMENKO MIKHAIL M,SU;MARKOV YURIJ M,SU
分类号
E21D1/06;E21D5/00
主分类号
E21D1/06
代理机构
代理人
主权项
地址
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