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发明名称
Ladder attachment
摘要
申请公布号
US2008582(A)
申请公布日期
1935.07.16
申请号
US19350001936
申请日期
1935.01.15
申请人
ROBERT FREDRIKSEN
发明人
FREDRIKSEN ROBERT
分类号
E06C7/42
主分类号
E06C7/42
代理机构
代理人
主权项
地址
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