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经营范围
发明名称
Etançon double pour le creusement des excavations minières souterraines.
摘要
申请公布号
BE599045(A1)
申请公布日期
1961.05.02
申请号
BE19610599045
申请日期
1961.01.12
申请人
BWG, BERGWERK- UND WALZWERK-MASCHINENBAU G.M.B.H.
发明人
分类号
(IPC1-7):E21D
主分类号
(IPC1-7):E21D
代理机构
代理人
主权项
地址
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