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发明名称
Improvements in and relating to methods of and apparatus for applying centre spots tocrown caps
摘要
申请公布号
GB518393(A)
申请公布日期
1940.02.26
申请号
GB19380027691
申请日期
1938.09.22
申请人
JOHN OSWALD FARRER
发明人
分类号
B21D51/46
主分类号
B21D51/46
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代理人
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