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发明名称
MANUFACTURE OF SQUARE STEEL TUBE
摘要
申请公布号
JPH04162920(A)
申请公布日期
1992.06.08
申请号
JP19900285743
申请日期
1990.10.25
申请人
NKK CORP
发明人
TAKAGI HIROMI;KONO KENSAKU;KATO TOMIJI;SEKINE YUKIO;SUGIMOTO YUJI;KOJIMA SHINJI
分类号
B21C37/15;B21D5/12
主分类号
B21C37/15
代理机构
代理人
主权项
地址
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