Sleepers, also known as sleepers, are a type of railway accessory. However, the materials used are not just wood, so it is more scientific to call sleepers.
Although the appearance of the sleepers is monotonous and uniform, and their appearance is not surprising, their function is not small. Sleepers not only support the steel rails, but also maintain their position, and also transmit the enormous pressure transmitted by the steel rails to the track bed. It must have a certain degree of flexibility and elasticity, neither hard nor soft. When a train passes by, it can deform appropriately to cushion the pressure, but it must be restored to its original state as much as possible after the train passes.
