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摘要
申请公布号
US2997352(A)
申请公布日期
1961.08.22
申请号
US19600050944
申请日期
1960.08.22
申请人
IRVING COWAN
发明人
COWAN JACK;COWAN LEON J.
分类号
A24F9/14;A47K1/09
主分类号
A24F9/14
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