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发明名称
An improved support structure for mines
摘要
申请公布号
GB796840(A)
申请公布日期
1958.06.18
申请号
GB19560021040
申请日期
1956.07.06
申请人
AUGUST THYSSEN-HUTTE AKTIENGESELLSCHAFT
发明人
分类号
E21D11/18;E21D11/20;E21D15/22
主分类号
E21D11/18
代理机构
代理人
主权项
地址
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