Pump: usually lift liquid, transport liquid or increase the pressure of the liquid, that is, the mechanical energy of the prime mover into liquid energy to achieve the purpose of pumping liquid machine collectively referred to as the pump. There are more types of pumps, which can be divided into micro self-priming pumps and micro submersible pumps. According to the type of motor can be divided into: brush micro water pump, brushless micro water pump. There are divided into pump 20-80ml /min low flow, 15-20L/min high flow, can be used for a variety of industries. Low flow pumps are usually used for breast pumps and sweeping robots. High flow can be used for drinking machine, tea machine.