A loader is a type of earthmoving machinery widely used in construction projects such as highways, railways, buildings, hydropower, ports, and mines. It is mainly used for loading and unloading bulk materials such as soil, sand, gravel, lime, and coal, and can also perform light digging operations on ores and hard soil. By changing different auxiliary working devices, it can also perform bulldozing, lifting, and loading and unloading operations of other materials such as timber.