R50-R60: USED RAIL STEEL SCRAP IS SUITABLE FOR RE-ROLLING INTO BARS AND SHAPES. FREE FROM BENT TWISTED RAILS. FROGS, SWITCHES, AND GUARD RAILS, OR RAILS WITH SPLIT RAIL.

• 美国废钢铁标准R50-R60:废旧钢轨适合用于再轧成其他形状。不含任何弯曲或扭曲轨、道岔、转辙器及制动轨，或有裂口或破底钢轨。