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发明名称
TUNNEL EXCAVATING PROCESS AND DRILLING MACHINE
摘要
申请公布号
KR1019940002464(B1)
申请公布日期
1994.03.24
申请号
KR1019910017254
申请日期
1991.10.02
申请人
发明人
分类号
主分类号
代理机构
代理人
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