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发明名称
Improvements in extensible ladders
摘要
申请公布号
GB814546(A)
申请公布日期
1959.06.10
申请号
GB19560018276
申请日期
1956.06.13
申请人
RAMSAY & SONS (FORFAR) LIMITED
发明人
DEVINE DANIEL
分类号
E06C1/12;E06C7/16
主分类号
E06C1/12
代理机构
代理人
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