1. No gears, no traditional faults such as couplings, no bearings for the motor, more stable operation and less noise; 2. Unique design, dual hosts, dual motors, horizontal placement, less vibration, more stable and comfortable operation; 3. Dual air ends, double frequency conversion, stepless speed change, so that the host is always running at an energy-saving speed, more energy-saving; Oil-cooled IP55 fully enclosed motor, the motor is controlled in a good state, with higher efficiency and safety.