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Hydraulic equipment is machines and tools which use fluid power to do work. Heavy equipment is a common example. In this type of equipment, hydraulic fluid is pumped to a high pressure and transmitted throughout the machine to various actuators. The hydraulic pumps are powered by engines or electric motors. Pressurized fluid is controlled by the operator with control valves and distributed through hoses and tubes.
The popularity of hydraulic machinery is due to the very large amount of power that can be transferred through small tubes and flexible hoses; and the high power density and wide array of actuators that can make use of this power.
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