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发明名称
Method for punching sheet metal blanks for spring casings
摘要
申请公布号
US2233000(A)
申请公布日期
1941.02.25
申请号
US19360084886
申请日期
1936.06.12
申请人
RECONSTRUCTION FINANCE CORPORATION
发明人
CHESLEY WALTER R.
分类号
B21D53/00;B21D53/88
主分类号
B21D53/00
代理机构
代理人
主权项
地址
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