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发明名称
Folding boarding ladder
摘要
申请公布号
US2924291(A)
申请公布日期
1960.02.09
申请号
US19560584573
申请日期
1956.05.14
申请人
TUNSTEAD CHARLES W
发明人
TUNSTEAD CHARLES W.
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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