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发明名称
Roller skate brake
摘要
申请公布号
USD315941(S1)
申请公布日期
1991.04.02
申请号
US07/397304
申请日期
1989.08.23
申请人
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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