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经营范围
发明名称
Improvements in and relating to ladders
摘要
申请公布号
GB823192(A)
申请公布日期
1959.11.04
申请号
GB19580011960
申请日期
1958.04.15
申请人
ROBERT SCOTT RAMSAY
发明人
分类号
E06C7/08
主分类号
E06C7/08
代理机构
代理人
主权项
地址
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