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发明名称
Spool
摘要
申请公布号
US2477010(A)
申请公布日期
1949.07.26
申请号
US19460717641
申请日期
1946.12.21
申请人
E. I. DU PONT DE NEMOURS & COMPANY
发明人
SCHMIDT EDGAR H.
分类号
G03B17/30
主分类号
G03B17/30
代理机构
代理人
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地址
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