In the early stages of refinery development, when illuminating and lubricating oils were the main products, distillation was the major and often only refinery process.
In the early stages of refinery development, when illuminating and lubricating oils were the main products, distillation was the major and often only refinery process.
在早期炼油工业发展过程中，照明用油和润滑油是主要的产品，蒸馏则成了主要的甚至经常是唯一的炼油工艺。