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发明名称
Improvements in and relating to apparatus for forming wire rings
摘要
申请公布号
GB712135(A)
申请公布日期
1954.07.21
申请号
GB19510029120
申请日期
1951.12.12
申请人
PAUL ESSER
发明人
分类号
B21D11/06
主分类号
B21D11/06
代理机构
代理人
主权项
地址
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