hydraulic equipment; hydraulic machinery
Technical term for machines and devices that use hydraulic power, such as hydraulic pumps, cylinders, and presses.
This factory processes metal using hydraulic machinery.
Hydraulic equipment requires regular maintenance.
油圧 refers to hydraulic pressure itself, while 油圧機器 specifically denotes the equipment or machinery that uses that pressure.
機器 is a general term for equipment or apparatus; 油圧機器 narrows it to hydraulic-powered devices.
Compound of 油圧 (hydraulic pressure) and 機器 (equipment, machinery).