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发明名称
Method and apparatus for making finned articles
摘要
申请公布号
US1990069(A)
申请公布日期
1935.02.05
申请号
US19330674301
申请日期
1933.06.05
申请人
THE SUPERHEATER COMPANY
发明人
GORDON CHARLES W.
分类号
B21C37/22;B23K9/038
主分类号
B21C37/22
代理机构
代理人
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