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发明名称
Ladder platform
摘要
申请公布号
US2881028(A)
申请公布日期
1959.04.07
申请号
US19570689519
申请日期
1957.10.11
申请人
BAIRD JAMES D
发明人
BAIRD JAMES D.
分类号
E06C7/16
主分类号
E06C7/16
代理机构
代理人
主权项
地址
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