液压介质 meaning in Chinese

hydraulic medium
pre ure medium
pressure medium

Oil temperature control : the oil temperature reducing system is provided for the hydraulic medium to ensure the reliability and stability
油温控制：为保持液压系统的可靠性和稳定性，液压介质设有降油温系统。
All the work actuating parts for the movement of the pile driver are controlled by hydraulic system . temperature reducing system is provided for the hydraulic medium to ensure thestability and reliability
桩机所有运动的工作执行部件均由液压系统控制，为保持液压系统的可靠性与稳定性，液压介质设有降温系统。