Yes, a single-rope lifting system can be used in an electric-hydraulic lifting system. The electric-hydraulic system provides the power to lift and lower the load, while the single-rope system manages the vertical movement of the load. This combination allows for precise control and can be advantageous in applications requiring both the lifting capacity of hydraulics and the simplicity of a single-rope system. However, the design must ensure compatibility between the mechanical and hydraulic components to function effectively and safely.