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发明名称
A method of manufacturing sheet metal radiator elements and the product manufacturedthereby
摘要
申请公布号
GB499696(A)
申请公布日期
1939.01.27
申请号
GB19380010659
申请日期
1938.04.07
申请人
DE VRIES ROBBE & CO. N.V.
发明人
分类号
B21D53/04
主分类号
B21D53/04
代理机构
代理人
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