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发明名称
ULTRAFINE-GRAIN STEEL PIPE AND PROCESS FOR MANUFACTURING THE SAME
摘要
申请公布号
KR20000068335(A)
申请公布日期
2000.11.25
申请号
KR19997001507
申请日期
1999.02.25
申请人
发明人
分类号
B21B17/14;C21D8/00;C21D8/10;C22C38/00;C22C38/14;C22C38/44;C22C38/54
主分类号
B21B17/14
代理机构
代理人
主权项
地址
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