One of the aircraft drafts that took part in the bidding last year, the aircraft draft has nothing to say. It mainly shows the cleaning ability of two different sweeping robots. One is because the internal structure is upgraded (look at the back plate) and the other is ordinary and has general cleaning ability. Therefore, the back plate is based on the principle of upgrading. The bottom of the model is two models, and the bottom of the model is a flowing strip screen, A flow of dirt disappeared, a flow of the past part of the dirt is still there, the overall style of the individual actually prefer.