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发明名称
PRODUCTION OF PIERCING MANDREL FOR ROLLING SEAMLESS STEEL TUBE
摘要
申请公布号
JPH06339709(A)
申请公布日期
1994.12.13
申请号
JP19930129734
申请日期
1993.05.31
申请人
NIPPON STEEL CORP
发明人
SOGO YASUO
分类号
B21B25/00;C21D9/00;(IPC1-7):B21B25/00
主分类号
B21B25/00
代理机构
代理人
主权项
地址
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