no. The appearance of the prototype is not as good as that of the new machine, and when users choose the prototype, they should carefully check the appearance of the prototype, where it is worn, where it is scratched, where it is concave or convex, where it has been deformed, whether there are collision marks in key parts, etc., and it is more troublesome to screen it, so it is not necessary to specialize in new houses. A prototype refers to a sample made to verify the rationality and correctness of a design or scheme or the feasibility of production.