1. Work efficiency, greatly shortening the time for the same work area;

2. Cleaning cost. It is certain that the cleaning cost per unit area of machinery is lower than labor;

3. The cleaning effect, the machine can avoid the uneven use of cleaning agents and the uneven cleaning effect;

4. Safety performance, keeping cleaners in a safe environment (too many vehicles on the road, their own safety awareness is not strong)

5. Economic returns. Take a car as an example. How much money it spent on the day it stopped using is the real price. In addition to investment costs, there are operating costs and labor costs.