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发明名称
Swimming instructor
摘要
申请公布号
US2033275(A)
申请公布日期
1936.03.10
申请号
US19310533029
申请日期
1931.04.27
申请人
LAYARD CAMPBELL
发明人
CAMPBELL LAYARD
分类号
A63B69/10
主分类号
A63B69/10
代理机构
代理人
主权项
地址
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