Recently, some pump dealers across the country have found China Metrology University, hoping to come to the door to buy prototypes. It turned out that the two teachers in the school used technology innovation to make a pump that was both quiet and has a flow and high suction and low energy consumption. Although it has not been promoted, the reputation of the composite pump is still in the small pump industry, and even spread to foreign countries, many Japanese companies with leading pump technology also hope to see and learn.