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发明名称
Device for adjusting the tension of the upper thread in sewing machines
摘要
申请公布号
US2726053(A)
申请公布日期
1955.12.06
申请号
US19530348635
申请日期
1953.04.14
申请人
VITTORIO NECCHI SOCIETA PER AZIONI
发明人
PAGNI ALESSANDRO
分类号
D05B47/00
主分类号
D05B47/00
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