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发明名称
Attachment for ladders
摘要
申请公布号
US1900636(A)
申请公布日期
1933.03.07
申请号
US19320609954
申请日期
1932.05.07
申请人
DAVIS CHARLES H
发明人
DAVIS CHARLES H.
分类号
E06C7/14
主分类号
E06C7/14
代理机构
代理人
主权项
地址
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