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。

youdao

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。

youdao