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发明名称
Procédé de soutènement marchant du toit d'une galerie de mine et appareil pour la mise en oeuvre de ce procédé
摘要
申请公布号
FR89001(E)
申请公布日期
1967.04.28
申请号
FR19630953365
申请日期
1963.11.12
申请人
发明人
GROETSCHEL KARL MARIA
分类号
E21D23/00;E21D23/06
主分类号
E21D23/00
代理机构
代理人
主权项
地址
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