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发明名称
LAGGING IRONS FOR MINE ROOFS.
摘要
申请公布号
IE20570(L)
申请公布日期
1953.11.30
申请号
IE19530000205
申请日期
1953.04.20
申请人
USINES ET ACIERIES LEONARDGIOT, SOCIETE ANONYME.
发明人
分类号
E21D;(IPC1-7):E21D
主分类号
E21D
代理机构
代理人
主权项
地址
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