油ゆ圧あつ系けいMeaningsNoun1. hydraulic systemKanji used油oil圧pressure系lineagePitch accentゆあつけいComposed of油ゆ圧あつoil pressureNoun系けいsystem; lineage; group; corollary; system (range of strata that correspond to a particular time period); (taxonomical) seriesNoun