noun
a branch of science and engineering concerned with the practical applications of fluid mechanics, especially in relation to machines that use liquids
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The engineer explained the intricate workings of the hydraulics system in the aircraft.
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I don't understand how the hydraulics in this car work, do you?
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I heard that dude is a pro at fixing hydraulics in lowriders.
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The company's financial success was like a well-oiled machine, with the hydraulics of their business strategy running smoothly.