简直难以相信它曾经一售而空，这是对这本书主题的重要性和对道格拉斯和马克叙述能力—生动有趣，充满智慧，自然流畅—的肯定。
I do not believe it has ever been out of print, a testament to the importance of the subject and to Douglas and Mark's natural storytelling abilities, charm, wit and unforced writing styles.
较具体地叙述了机组转速和空燃比的主要影响因素、关系曲线、控制系统构成和PID算法的实现方法。
The main influence factors of the speed and air-fuel ratio and the relation curves of the unit, the structure and PID algorithm of the system are described concretely.
叙述了基于PLC的回转式空预器漏风控制系统的组成、工作原理及软件的各项功能。
The composition and principle of air leakage control system of rotary air preheater based on PLC and various functions of software developed in this air leakage control system are described.
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