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发明名称
Improvements relating to iron sections for lining mine galleries and other purposes
摘要
申请公布号
GB346174(A)
申请公布日期
1931.04.09
申请号
GB19300011907
申请日期
1930.04.15
申请人
HEINRICH CARL SCHUETZ
发明人
分类号
E21D11/15
主分类号
E21D11/15
代理机构
代理人
主权项
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