The washing machine is a great machine for lazy people. All you have to do is put your washing in with some detergent, spin it for a bit, and your clothes are clean. I wonder who thought up this wonderful idea. Despite the fact that the basic structure of a washing machine is extremely simple, every year, new washing machine models are released again and again. Now there are a lot of washing machines with all manner of blades lined up in the shops. How does the water current change with different blades?