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发明名称
Système de soutèment pour toits de chantiers miniers et de galeries d'exploitation.
摘要
申请公布号
BE583478(A1)
申请公布日期
1960.02.01
申请号
BE19590583478
申请日期
1959.10.09
申请人
TUBEWRIGHTS LIMITED
发明人
分类号
E21D11/18;E21D15/22;(IPC1-7):E21D
主分类号
E21D11/18
代理机构
代理人
主权项
地址
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