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发明名称
An improved machine for producing fins for finned tube core structures
摘要
申请公布号
GB723907(A)
申请公布日期
1955.02.16
申请号
GB19520005888
申请日期
1952.03.06
申请人
JOHN WILLIAM LAWRENCE
发明人
分类号
B21C37/22;B21D53/02
主分类号
B21C37/22
代理机构
代理人
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