hydraulic machine; hydraulically operated machine
Refers to machinery powered or controlled by hydraulic pressure, such as hydraulic presses, lifts, or excavators.
This factory uses hydraulic machines to shape metal.
油圧 means 'hydraulic pressure' or 'oil pressure' and is often used as a prefix in compounds like 油圧機械, while 油圧機械 specifically refers to the machine itself.
Compound of 油圧 (hydraulic pressure) and 機械 (machine).