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发明名称
Swimming pool cover
摘要
申请公布号
US2788849(A)
申请公布日期
1957.04.16
申请号
US19540418372
申请日期
1954.03.24
申请人
LINGARD RUSSEL S
发明人
LINGARD RUSSEL S.
分类号
E04H4/08
主分类号
E04H4/08
代理机构
代理人
主权项
地址
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