noun
straight diesel oil
Technical term used in petroleum refining; refers to diesel oil obtained directly from atmospheric distillation without further processing.
直留軽油は蒸留装置から直接得られる軽油留分です。
Straight diesel oil is a diesel fraction obtained directly from a distillation unit.
Compound of 直留 (ちょくりゅう, 'straight distillation') and 軽油 (けいゆ, 'light oil/diesel oil').