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发明名称
Improvements in or relating to ladders
摘要
申请公布号
GB592696(A)
申请公布日期
1947.09.25
申请号
GB19450013739
申请日期
1945.05.31
申请人
GRAVITY LADDERS LIMITED;CHARLES HAROLD BACH
发明人
分类号
E06C7/08
主分类号
E06C7/08
代理机构
代理人
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