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发明名称
THE METHOD OF GUIDANCE OF WALL HEADING IN CONDITIONS OF GREAT DEFORMATIONS OF A ROCK MASS
摘要
申请公布号
PL262940(A1)
申请公布日期
1988.08.18
申请号
PL19860262940
申请日期
1986.12.10
申请人
发明人
分类号
E21D;E21D9/00;E21F17/00;(IPC1-7):E21D/
主分类号
E21D
代理机构
代理人
主权项
地址
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