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发明名称
Method of manufacturing metallic tube with spiral fin
摘要
申请公布号
US4959985(A)
申请公布日期
1990.10.02
申请号
US19890404641
申请日期
1989.09.08
申请人
SUMITOMO METAL INDUSTRIES LTD.
发明人
KURODA, KOUICHI;HAYASHI, CHIHIRO;NAKASUJI, KAZUYUKI
分类号
B21C37/20
主分类号
B21C37/20
代理机构
代理人
主权项
地址
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