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发明名称
Eckverbindungsstueck fuer den Grubenausbau
摘要
申请公布号
DE569355(C)
申请公布日期
1933.02.02
申请号
DENDATT040664D
申请日期
申请人
ALFRED THIEMANN
发明人
分类号
E21D11/00
主分类号
E21D11/00
代理机构
代理人
主权项
地址
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