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发明名称
Ladder
摘要
申请公布号
US2397950(A)
申请公布日期
1946.04.09
申请号
US19440550544
申请日期
1944.08.22
申请人
DAHLANDER NOEL L
发明人
DAHLANDER NOEL L.
分类号
E06C1/56
主分类号
E06C1/56
代理机构
代理人
主权项
地址
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