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发明名称
Verbindungsstueck fuer Grubenausbauteile
摘要
申请公布号
DE633477(C)
申请公布日期
1936.07.28
申请号
DE1931T039784D
申请日期
1931.11.20
申请人
ALFRED THIEMANN
发明人
分类号
E21D11/34
主分类号
E21D11/34
代理机构
代理人
主权项
地址
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