Abstract
News editors obtained the following quote from the background information suppli ed by the inventors:“At present, there are two types of pool cleaning robots. O ne is dedicated to cleaning a bottom and verticalwall surfaces of a pool, and t he other is dedicated to cleaning a water surface of the pool. Therefore, if au ser wants to clean a bottom surface, the wall surfaces, and the water surface of the pool automatically,it is necessary to prepare two pool cleaning robots to clean respectively, which results in high cost and lowcleaning efficiency.”
NETL
NSTL