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发明名称
Support d'avancement du toit des galeries de mines
摘要
申请公布号
FR1505639(A)
申请公布日期
1967.12.15
申请号
FR19660084202
申请日期
1966.11.18
申请人
A.G. WILD & CO LIMITED
发明人
分类号
E21D23/04
主分类号
E21D23/04
代理机构
代理人
主权项
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