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摘要
申请公布号
US1768087(A)
申请公布日期
1930.06.24
申请号
US19280290109
申请日期
1928.07.03
申请人
LEVERSON IRVING B
发明人
LEVERSON IRVING B.
分类号
A63B71/06
主分类号
A63B71/06
代理机构
代理人
主权项
地址
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