精せい製せい

noun, noun or participle which takes 'suru', transitive verb

refining; purification

Used for industrial or chemical processes that remove impurities from substances such as oil, sugar, or metals.

• 原げん油ゆを精せい製せいしてガソリンを作つくる。

  Crude oil is refined to produce gasoline.

• この工こう場じょうでは砂さ糖とうを精せい製せいしている。

  This factory refines sugar.

noun, noun or participle which takes 'suru', transitive verb

careful manufacture; meticulous production

Emphasizes the care and precision in making something, often used for high-quality or artisanal products. Less common than sense 1.

• その職しょく人にんは精せい製せいした和わ紙しを使つかっている。

  The artisan uses carefully manufactured Japanese paper.