1. Check the pressure valve of the fire extinguisher before use. Normally, the pointer should be in the green area
2. Portable dry powder fire extinguishers must be erected for use.
3. After the safety pin is pulled out, it is forbidden to touch people at the nozzle
4. When extinguishing the fire, the operator must operate in the upwind direction.
5. Pay attention to control the effective distance of fire extinguishing points