Hydraulic machines use pressurized fluid to generate power and perform work based on fluid mechanics principles. They multiply force through hydraulic pumps that increase fluid pressure to power hydraulic actuators like cylinders and motors. Key components include hydraulic pumps, fluid, cylinders, motors, and valves. Hydraulic systems provide precise, powerful, and reliable operation essential for construction equipment, manufacturing machinery, vehicles, agriculture equipment, and mining. Their versatility makes them well-suited for diverse industrial applications.