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发明名称
Interchangeable lightweight rung ladder
摘要
申请公布号
GB0021399(D0)
申请公布日期
2000.10.18
申请号
GB20000021399
申请日期
2000.09.01
申请人
FREW, JOHN A
发明人
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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