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发明名称
Ladder pad
摘要
申请公布号
US2993562(A)
申请公布日期
1961.07.25
申请号
US19600070065
申请日期
1960.11.17
申请人
HUSSEY JOHN J
发明人
HUSSEY JOHN J.
分类号
E06C7/48
主分类号
E06C7/48
代理机构
代理人
主权项
地址
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