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经营范围
发明名称
Spring washer
摘要
申请公布号
US1876834(A)
申请公布日期
1932.09.13
申请号
US19310556676
申请日期
1931.08.12
申请人
NATIONAL LOCK WASHER COMPANY
发明人
BERGE JOSEPH
分类号
F16B39/24
主分类号
F16B39/24
代理机构
代理人
主权项
地址
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