1. Petrochemical industry: In the process of petroleum refining and chemical production, there are often flammable and explosive gases and dust. The explosion-proof positive pressure box can be used to control the electrical equipment in these dangerous areas, such as the start-up control of motors, the power supply and control of instruments and meters, etc.

2. Coal mining industry: There are combustible gases such as gas in the underground coal mine. The explosion-proof positive pressure box can provide a safe operating environment for electrical devices such as underground lighting, ventilation equipment, and monitoring equipment.

3. Pharmaceutical industry: In the process of drug production, volatile flammable and explosive gases or dust may be generated in some areas. The explosion-proof positive pressure box can be used for the protection of electrical equipment in this area.

4. Painting industry: In the operations such as painting and paint mixing, the volatile organic solvents form a flammable and explosive environment. The explosion-proof positive pressure box can be used to protect the electrical control system.

5. Grain processing and storage industry: During the processing, transportation, and storage of grain, flammable dust may be generated. The explosion-proof positive pressure box can be used for the protection of electrical equipment in the dust environment.

6. Gas industry: In the links of gas storage, transportation, and pressure regulation, the explosion-proof positive pressure box can be used for the explosion-proof protection of relevant electrical equipment to ensure the safe operation of the gas system.

7. Shipbuilding industry: In areas such as the engine room and fuel storage tank of ships, there are flammable and explosive gases. The explosion-proof positive pressure box can be used for electrical equipment in these areas.