How do you make a dentist chair using hydraulics for grade 8?

To make a dentist chair using hydraulics, you would start by creating a sturdy base that can hold the chair's weight. Next, you would install a hydraulic lift system, which consists of a hydraulic cylinder connected to a foot pedal or lever that allows the chair to be raised and lowered smoothly. The chair itself should be padded for comfort and have adjustable features to position it for dental procedures. Finally, ensure that all components are securely attached and functional for safety and usability.