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发明名称
TRAGKONSTRUKTION EINER TREPPE, INSBESONDERE INNENTREPPE
摘要
申请公布号
DE2419217(B2)
申请公布日期
1977.06.02
申请号
DE19742419217
申请日期
1974.04.22
申请人
发明人
分类号
E04F11/025;(IPC1-7):E04F11/02
主分类号
E04F11/025
代理机构
代理人
主权项
地址
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