Rail heat-treated 硬头轨条
The Speedy Rail beam is a heat-treated aluminium alloy profile with hollow cross-sections that give it high strength under torsion and deflection stresses.
快速铁路是束热处理铝合金型材中空截面，给高强度下的扭转和挠度应力。
Heavy haul and high speed railways require high strength, tough rail heat treated rails.
简述了重载、速铁路运输需要高强韧性钢轨——全长热处理钢轨的必要性。
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