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发明名称
Flatstep ladder
摘要
申请公布号
US3349870(A)
申请公布日期
1967.10.31
申请号
US19660575163
申请日期
1966.08.25
申请人
GEORGE LIEBLEIN
发明人
LIEBLEIN GEORGE
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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