A crusher is a machine used to break down large stones and ores into smaller pieces. It is commonly used in construction, mining, and road building. The working principle is based on mechanically crushing the material by applying pressure. Crushers can use different mechanisms depending on the material and desired size, such as jaw crushers, cone crushers, or impact crushers.

A mobile crusher is a portable machine capable of crushing stones and ores on site. It is usually designed with wheels or tracks and is convenient for use in construction sites and quarries. Mobile crushers offer quick setup and transport advantages, making them suitable for use at different locations.

A stationary crusher is a crushing machine fixed at a specific location for continuous operation. It is preferred for large-scale projects and facilities requiring continuous production. Stationary crushers typically have higher capacity and durability.

The differences between mobile and stationary crushers are: mobile crushers are portable and quick to set up, while stationary crushers are fixed and have larger capacities. Mobile crushers provide mobility on site, whereas stationary crushers are suitable for continuous and long-term production. Mobile crushers are usually smaller and more flexible, while stationary crushers are used for heavy-duty work and high production rates.

A gravel crushing plant is a facility where natural stones or ores are crushed to produce gravel of various sizes. It is used in road construction, concrete, and asphalt production. The process includes crushing, screening, and washing; the material is first crushed, then screened to the desired size, and finally cleaned.