A winch (also known as a hoist) is a mechanical device that uses a drum to wind steel wire ropes or chains to lift, pull, or transport heavy objects. It is widely used in construction, mining, ports, water conservancy projects, and other fields. Classification of winches: Electric winches: Driven by an electric motor, they are efficient and convenient to operate, and are commonly used. Hydraulic winches: Driven by a hydraulic system, they have strong power and are suitable for larger tonnage operations. Manual winches: Operated by hand with a handle, they are used for small-scale or emergency scenarios.