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经营范围
发明名称
Prestressed spring
摘要
申请公布号
US2626799(A)
申请公布日期
1953.01.27
申请号
US19460691059
申请日期
1946.08.16
申请人
HOWELL JOHN D
发明人
HOWELL JOHN D.
分类号
F16F1/02;F16F3/02
主分类号
F16F1/02
代理机构
代理人
主权项
地址
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