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发明名称
Ladder
摘要
申请公布号
US2542923(A)
申请公布日期
1951.02.20
申请号
US19470754803
申请日期
1947.06.16
申请人
ESKIL HALLEN ALF
发明人
HALLEN ALF ESKIL
分类号
B63B27/14
主分类号
B63B27/14
代理机构
代理人
主权项
地址
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