1. self-clearance, 2.low noise, 3.smooth start-up, 4.small power consumption, 5.low failure rate. The use of three-in-one drive lane or adjustable and the motor reducer. Reducer three-in-one small, self-clearance, low noise, smooth start-up, small power consumption, low failure rate. Can be as slip ring motor speed control, with multi-stage resistor. To achieve multi-level walking speeds. The ...