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发明名称
Einzelschwelle aus Metall
摘要
申请公布号
DE621003(C)
申请公布日期
1935.10.31
申请号
DENDATM127469D
申请日期
申请人
CHARLES ROBERT MAYO
发明人
分类号
E01B3/24
主分类号
E01B3/24
代理机构
代理人
主权项
地址
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