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发明名称
SCHUTZABDECKUNG FUER TREPPENSTUFEN.
摘要
申请公布号
DE1757323(U)
申请公布日期
1957.12.05
申请号
DE195400ST660U
申请日期
1954.01.20
申请人
ADOLF STADTELMEYER
发明人
ADOLF STADTELMEYER
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主分类号
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