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发明名称
METHOD AND APPARATUS FOR EXCAVATING VERTICAL TUNNEL
摘要
申请公布号
KR1019890003263(B1)
申请公布日期
1989.08.31
申请号
KR1019830002906
申请日期
1983.06.28
申请人
发明人
分类号
主分类号
代理机构
代理人
主权项
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