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发明名称
Thread production
摘要
申请公布号
US2223923(A)
申请公布日期
1940.12.03
申请号
US19380207587
申请日期
1938.05.12
申请人
E. I. DU PONT DE NEMOURS & COMPANY
发明人
SINNESS LESTER S.
分类号
B65H57/00
主分类号
B65H57/00
代理机构
代理人
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