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| CDD6A1 locomotive is AC-DC diesel locomotive specifically designed for mainline freight transportation on narrow gauge railway. The locomotive adopts a single driver's cab and outside corridor structure, equipped with an electric injection diesel engine of 2200kW service power and maximum operating speed of 80km/h. | 
| Main Technical Parameters | 
| Application | Main line freight transportation | Track Gauge | 1000mm | 
| Axle Arrangement | C0-C0 | Wheel Diameter | 1016mm | 
| Axle Load | 17t | Locomotive Service Weight | 102t | 
| Max. Service Output of Diesel Engine | 2200kW | Min. Negotiable Curve Radius | 80m | 
| Max. Running Speed | 80km/h | Continuous Speed | 22.5km/h | 
| Max. Starting Tractive Effort | 295kN | Continuous Tractive Effort | 230kN | 
| Fuel Capacity | 4000L | Oil Capacity | 360kg | 
| Sand Capacity | 400kg | Overall Dimensions (L×W×H) | 18760mm×3070mm×4020mm |