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发明名称
étai hydraulique de mines
摘要
申请公布号
FR1265718(A)
申请公布日期
1961.06.30
申请号
FR19600836451
申请日期
1960.08.22
申请人
ACROW (ENGINEERS) LIMITED
发明人
分类号
E21D15/44
主分类号
E21D15/44
代理机构
代理人
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