The residual oil obtained by vacuum distillation of crude.

原油经减压蒸馏所得的残余油。

Such as: vacuum distillation, evaporation, dehydration, crystal, drying in the process.

如：真空蒸馏、蒸发、脱水、结晶、干燥等工艺过程中。

It is a guide for the vacuum deep cut revamping on atmospheric and vacuum distillation unit.

结果表明对常减压装置减压深拔技术改造有一定的指导意义。

The purifcation of Dy, Ho and Er metals has been studied by the method of vacuum distillation.

本文研究了金属镝、、的真空蒸馏提纯效果。

The refined product with high purity is obtained by vacuum distillation of crude benzal chloride.

将制得的苄叉二氯粗品进行真空精馏得到高纯度的精品；