A warehouse where bulk materials are stored. It is divided into two categories: agricultural silos and industrial silos. Agricultural silos are used to store granular and powdery materials such as grain and feed; Industrial silos are used to store bulk materials such as coke, cement, salt, sugar, etc. The cost of mechanized silos is generally about 1/3 higher than the cost of mechanized chambers, but it can shorten the loading and unloading process of materials, reduce operation and maintenance costs, eliminate heavy bagging operations, and facilitate mechanized and automated operations, so it has become one of the most important forms of granaries.