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发明名称
Ladder step
摘要
申请公布号
US2432206(A)
申请公布日期
1947.12.09
申请号
US19460685465
申请日期
1946.07.22
申请人
HOWARD MOTT JOHN
发明人
MOTT JOHN HOWARD
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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