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经营范围
发明名称
Improvements in or relating to the production of tubular parts by extrusion
摘要
申请公布号
GB837333(A)
申请公布日期
1960.06.09
申请号
GB19570030273
申请日期
1957.09.26
申请人
OTTO MAY
发明人
分类号
B21C23/03
主分类号
B21C23/03
代理机构
代理人
主权项
地址
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