工程塑料用于机械工程上已有二十多年了。近年来工程塑料品种日益增多,特别是各种优质增强复合塑料的问世,其机械性能有显著提高,使其某些性能远远优越于传统 Engineering plastics have been used in mechanical engineering for more than two decades. In recent years, an increasing variety of engineering plastics, especially the advent of various high-quality enhanced plastics, its mechanical properties have significantly improved, so that some of its performance is far superior to the traditional