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发明名称
Process for the manufacture of hollow profile sections from sheet metal
摘要
申请公布号
GB352614(A)
申请公布日期
1931.07.16
申请号
GB19300013892
申请日期
1930.05.06
申请人
MAX GESSNER
发明人
分类号
B21D5/06
主分类号
B21D5/06
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