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发明名称
Ladder jack
摘要
申请公布号
US2605950(A)
申请公布日期
1952.08.05
申请号
US19490109937
申请日期
1949.08.12
申请人
COLVIN EDWARD H
发明人
COLVIN EDWARD H.
分类号
E06C7/48
主分类号
E06C7/48
代理机构
代理人
主权项
地址
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