作さ動どう液えき

noun

hydraulic fluid; working fluid

Technical term used in engineering contexts for the fluid that transmits power in hydraulic systems. Compare with 作動油, which specifically refers to hydraulic oil.

See also: 作動油

• この機き械かいの作さ動どう液えきは定てい期き的てきに交こう換かんする必ひつ要ようがある。

  The hydraulic fluid in this machine needs to be replaced regularly.