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发明名称
Bouclier pour le percement de tunnels dans les terrains pulvérulents
摘要
申请公布号
FR1381465(A)
申请公布日期
1964.12.14
申请号
FR19630951975
申请日期
1963.10.28
申请人
NAUTCHNO-ISSLEDOVATELSKI INSTITUTE OSNOVANI I PODZEMNYKH SOOROUJHENI
发明人
分类号
E21D9/06
主分类号
E21D9/06
代理机构
代理人
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