A unitary one-quarter mile long railroad rail which is free of weld seams. The rail is produced via a process including continuous rolling and asymmetric cooling.
申请公布号
DE69029664(T2)
申请公布日期
1997.05.22
申请号
DE1990629664T
申请日期
1990.11.30
申请人
CF & I STEEL, L.P., PORTLAND, OREG., US
发明人
CRYDERMAN, ROBERT, L., PUEBLO, CO 81005, US;WINKLEY, JOHN, C., PUEBLO, CO 81005, US
