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经营范围
发明名称
Production of metal sections by extrusion
摘要
申请公布号
US2231336(A)
申请公布日期
1941.02.11
申请号
US19390282262
申请日期
1939.06.30
申请人
HIGH DUTY ALLOYS LIMITED
发明人
HERON JOHN AHERNE
分类号
B21C25/08
主分类号
B21C25/08
代理机构
代理人
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