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经营范围
发明名称
Extrusion apparatus
摘要
申请公布号
GB720244(A)
申请公布日期
1954.12.15
申请号
GB19520029475
申请日期
1952.11.21
申请人
WESTERN ELECTRIC COMPANY
发明人
分类号
B21C23/30
主分类号
B21C23/30
代理机构
代理人
主权项
地址
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