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发明名称
Improvements in and relating to metalic box sections
摘要
申请公布号
GB846315(A)
申请公布日期
1960.08.31
申请号
GB19570031389
申请日期
1957.10.08
申请人
SERGRAM
发明人
分类号
B21D5/16;B21D51/00
主分类号
B21D5/16
代理机构
代理人
主权项
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