Developing the fundamental principle and processing technology of the mineral fillers is described.
阐述了研制新型矿物填料的基本原理和加工技术。
Based on the analysis of principle of Universal Serial Bus, this paper discusses the developing technology of hardware and software about USB testing system.
在分析usb通用串行总线工作原理的基础上，讨论了USB测试系统中有关的硬件和软件开发技术。
The paper introduces the principle, effect of conversion frequency technology as well as the developing tendency of this industry, and concerning industrial strategies of China is followed.
介绍了电动机变频调速技术的原理、作用，变频调速技术产业的现状及发展趋势以及我国的对策。
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