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经营范围
发明名称
Improvements in or relating to forming flanged openings or nipples in metal pipes
摘要
申请公布号
GB767793(A)
申请公布日期
1957.02.06
申请号
GB19550002552
申请日期
1955.01.27
申请人
ANDRE HUET
发明人
分类号
B21C37/29
主分类号
B21C37/29
代理机构
代理人
主权项
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