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发明名称
Procédé et installation de soutènement pour galeries de mines
摘要
申请公布号
FR1146211(A)
申请公布日期
1957.11.07
申请号
FRD1146211
申请日期
1956.02.23
申请人
DOWTY MINING EQUIPMENT LIMITED
发明人
分类号
E21D23/00;E21D23/08;E21D23/16
主分类号
E21D23/00
代理机构
代理人
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地址
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