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发明名称
Protable platform step for stepladders
摘要
申请公布号
US3078950(A)
申请公布日期
1963.02.26
申请号
US19610140333
申请日期
1961.09.25
申请人
SCHRAMM ALBERT A
发明人
SCHRAMM ALBERT A.
分类号
E06C7/16
主分类号
E06C7/16
代理机构
代理人
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地址
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