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发明名称
Metal pipe drawing reduced diamether device exist step height in the external diameter and metal pipe exist step height in the external diameter
摘要
申请公布号
KR100943111(B1)
申请公布日期
2010.02.18
申请号
KR20080030845
申请日期
2008.04.02
申请人
发明人
分类号
B21C1/22;B21C1/16;B21C3/00;B21D41/04
主分类号
B21C1/22
代理机构
代理人
主权项
地址
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