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发明名称
Ladder
摘要
申请公布号
US2330825(A)
申请公布日期
1943.10.05
申请号
US19420437251
申请日期
1942.04.01
申请人
HOIT HENRY M
发明人
HOIT HENRY M.
分类号
E06C7/44
主分类号
E06C7/44
代理机构
代理人
主权项
地址
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