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发明名称
Method of close coiling sheathed spring wire
摘要
申请公布号
US2793672(A)
申请公布日期
1957.05.28
申请号
US19550495159
申请日期
1955.03.18
申请人
THE HOOVER COMPANY
发明人
DUFF JACK E.
分类号
B21F3/06
主分类号
B21F3/06
代理机构
代理人
主权项
地址
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