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。
Your best bet will be one of three materials, redwood, pressure treated fir, and used rail ties.
你最好的选择将是三种材料，红木，杉木对待压力，并利用铁路关系之一。
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。
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