介绍了转子侧变频调速技术的原理、系统构成及特点，并指出其相对于定子侧变频调速技术的优势所在。
Its principles, system structure and characteristics are introduced, and its advantage over the stator side VVVF is pointed.
介绍了彩虹金属屋顶成型机的构成、工作原理，通过系统原理图介绍了液压驱动系统的组成、工作原理及特点。
The paper introduces the composition and the working axiom of rainbow metal roof's make-up machine, and the working axiom of the hydraulic system.
文中介绍了“缫丝企业计算机管理系统”的构成及特点。
In this paper, it is introduced the constitution and characteristics of the computer management system in reeling enterprises.
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