Introduction to the historical changes of railway rails, modern rail knowledge, rail classification, rail production and transportation and other basic knowledge.

Rail is a common and inconspicuous thing in our life, and it can be seen everywhere in film and television. It is always in an inconspicuous place for the train to roll, guide, bury in the soil and penetrate the dust. But it's not only the foundation of the train, it's also a guy with a history. Today, let's talk about it, and take the reader to learn about the rail knowledge.