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发明名称
Head stand
摘要
申请公布号
US2919918(A)
申请公布日期
1960.01.05
申请号
US19570698798
申请日期
1957.11.25
申请人
LEONARD HORN CLARENCE
发明人
HORN CLARENCE LEONARD
分类号
A63B23/00
主分类号
A63B23/00
代理机构
代理人
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