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发明名称
Power horn
摘要
申请公布号
US3000344(A)
申请公布日期
1961.09.19
申请号
US19570642006
申请日期
1957.02.25
申请人
DONALD FERRELL
发明人
FERRELL DONALD
分类号
G10K9/04
主分类号
G10K9/04
代理机构
代理人
主权项
地址
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