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发明名称
Spring device
摘要
申请公布号
US2330120(A)
申请公布日期
1943.09.21
申请号
US19420442308
申请日期
1942.05.09
申请人
WILLIAM HAGELSTEIN
发明人
HAGELSTEIN WILLIAM
分类号
D06F55/02
主分类号
D06F55/02
代理机构
代理人
主权项
地址
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