Many of you should have seen a mopping robot that automatically cleans mopping cloths, it is called Narwal Mopping Robot, the main product of a startup company from Shenzhen, China. there are many videos on YouTube testing this amazing robot, if you are interested you can click to watch: Narwal Mopping Robot Test Observe its form of running, the most impressive thing is that its two mop cloths rotate at high speed, through this way very efficient cleaning ground dirt. Its bi