1. Two-stage compression reduces the compression ratio of each stage, reduces internal leakage, improves volumetric efficiency, reduces bearing load, and improves the life of the main engine. 2. Two-stage compression replaces single-stage compression, and the exhaust volume is increased by nearly 15%, which can achieve 15% more energy saving effect. 3. The rotor adopts the latest design, after more than 20 processes of finishing, to ensure the accuracy, reliability and effectiveness of the rotor profile. 4. The two-stage compressor is more efficient and energy saving, saving up to 35% compared with the twin screw air compressor, calculated at 8000h/ set/year, it can save 200,000 yuan of electricity every year.