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发明名称
PRODUCTION OF STEEL RAIL EXCELLENT IN DROP WEIGHT RESISTING CHARACTERISTIC
摘要
申请公布号
JPH04202626(A)
申请公布日期
1992.07.23
申请号
JP19900335150
申请日期
1990.11.30
申请人
NIPPON STEEL CORP
发明人
KAGEYAMA HIDEAKI;SUGINO KAZUO
分类号
C21D9/04
主分类号
C21D9/04
代理机构
代理人
主权项
地址
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