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发明名称
A new or improved means for preventing the slipping of ladders
摘要
申请公布号
GB610261(A)
申请公布日期
1948.10.13
申请号
GB19460010279
申请日期
1946.04.03
申请人
HARRY GILBERT
发明人
分类号
E06C7/48;E06C7/50
主分类号
E06C7/48
代理机构
代理人
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