· Design and Application of Screw Vacuum Pump:The image should showcase the core design of the screw vacuum pump, including the master and slave screws, frictionless motion, cooling water jacket, and its ability to handle small dust particles. Emphasize its role as an alternative to traditional pumps like water ring pumps, rotary vane pumps, reciprocating pumps, and sliding valve pumps, with energy-saving and eco-friendly features.