End hardening of rails,申请号US19480018518-传众专利搜索

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发明名称	End hardening of rails
摘要
申请公布号	US2573308(A)	申请公布日期	1951.10.30
申请号	US19480018518	申请日期	1948.04.02
申请人	BETHLEHEM STEEL COMPANY	发明人	CHAMBERLIN ALAN C.;WEIGLE RUSSELL M.
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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