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发明名称
Machine for forming lock washers
摘要
申请公布号
US1776663(A)
申请公布日期
1930.09.23
申请号
US19280276923
申请日期
1928.05.11
申请人
SHAKEPROOF LOCK WASHER COMPANY
发明人
OLSON CARL G.
分类号
B21D53/20
主分类号
B21D53/20
代理机构
代理人
主权项
地址
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