From the perspective of safety and environmental protection, what kind of cleaning agent should be used to meet the requirements of safety and environmental protection, such as solvent based cleaning. Generally, pneumatic spray machines are chosen, and environmentally friendly water-based cleaning agents (environmentally friendly water-based cleaning agents) are used. The cleaning machine should choose a spray cleaning machine or a combination of ultrasonic cleaning machines, and should be able to achieve a complete water-based process of cleaning, rinsing, and drying.