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发明名称
SHAFT DRILLING INSTALLATION
摘要
申请公布号
SU1631176(A1)
申请公布日期
1991.02.28
申请号
SU19884487458
申请日期
1988.09.28
申请人
GUMENNIKOV EVGENIJ S
发明人
GUMENNIKOV EVGENIJ S,SU
分类号
E21D1/00
主分类号
E21D1/00
代理机构
代理人
主权项
地址
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