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经营范围
发明名称
Ladder
摘要
申请公布号
US1806145(A)
申请公布日期
1931.05.19
申请号
US19280310115
申请日期
1928.10.03
申请人
BUSBY HENRY H
发明人
BUSBY HENRY H.
分类号
E06C1/34
主分类号
E06C1/34
代理机构
代理人
主权项
地址
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