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发明名称
STUFEN FUER GESCHOSSTREPPEN AUS STAHLBETON.
摘要
申请公布号
DE1700537(U)
申请公布日期
1955.06.16
申请号
DE195500B1251U
申请日期
1955.03.18
申请人
PAUL BILLEN & SOHN
发明人
分类号
主分类号
代理机构
代理人
主权项
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