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发明名称
Lock washer and method of making same
摘要
申请公布号
US2001956(A)
申请公布日期
1935.05.21
申请号
US19330699534
申请日期
1933.11.24
申请人
ILLINOIS TOOL WORKS
发明人
ENGLAND FRANK W.
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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