Macro-control of grain is the main means to maintain national food security, and grain depot is the basis of macro-control of grain. Therefore, intelligent control and precise management of grain depots are the key to achieve safe and efficient grain st..

First of all, you need to understand the negative effects of oxygen! Oxygen is an indispensable gas for human survival. Without oxygen, humans can asphyxiate in a few minutes. It is unknown that the damage to human beings should not be neglected when th..

Chlorine is a toxic gas with a yellowish-green color and a strong irritating odor. It can cause sneezing, coughing, tearing, asphyxia and other symptoms. It mainly invades the human body through the respiratory tract and dissolves in the water contained..