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发明名称
Verbindungsstueck zwischen Kappe und Stempel bei polygonartigem Streckenausbau
摘要
申请公布号
DE495090(C)
申请公布日期
1930.04.03
申请号
DE1928D056227D
申请日期
1928.07.27
申请人
AUGUST ECKEY;RERNHARD DROSTE
发明人
分类号
E21D11/34
主分类号
E21D11/34
代理机构
代理人
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