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发明名称
Improvements in or relating to ladders
摘要
申请公布号
GB375908(A)
申请公布日期
1932.07.07
申请号
GB19310010904
申请日期
1931.04.13
申请人
GEORGE EDWARD TESTER
发明人
分类号
E06C1/12
主分类号
E06C1/12
代理机构
代理人
主权项
地址
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