详细叙述了三电平pw M变频器在输出调频、调压和PWM调制控制中的作用以及三电平pw M变频器的优异性能。
The excellent properties of the TPFT and its function in the output frequency regulation, voltage regulation and PWM modulation control are stated in detail.
阐述金刚石切削工具在机加工中的重要作用和CVD金刚石的优异性能以及CVD金刚石切削工具的形式。
The important role of diamond cutting tool in machining, the outstanding performance of CVD diamond and the types of CVD diamond cutting tools were reviewed in this paper.
介绍了含氟涂料的优异性能，尤其是防腐功能以及在防腐方面的应用。
The outstanding anti - corrosive properties of the fluorocoatings and its application were also intro-duced.
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