In chemical engineering and related fields, a unit operation is a basic step in a process.
在化学工程及相关领域，一个单位的运作是一个过程基本介入。
The basic studies on catalytic cracking of petroleum fractions made at the Department of Chemical Engineering of East China Petroleum Institute during the last thirty years are reviewed in this paper.
本文回顾了近三十年来华东石油学院炼制系所做的有关石油馏份催化裂化的基础研究工作。
Chemical Engineering, chemical thermodynamics and physical chemistry and other basic courses, and achieved excellent results.
化工原理，化工热力学和物理化学等基础课程，并取得优异的成绩。
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