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发明名称
Ladder platform
摘要
申请公布号
US2749008(A)
申请公布日期
1956.06.05
申请号
US19550492221
申请日期
1955.03.04
申请人
WILSON HARRY A
发明人
WILSON HARRY A.
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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