It is very important to evaluate technical progress of construction industry and construction enterprises, and evaluation technique is the key factor for evaluation.
评价我国建筑业和建筑企业的技术进步意义重大，评价方法和指标体系的确定是其关键。
The application and preparation of ultra-fine chromium nitride powders are presented. Specially, the progress in preparation technique is reviewed. with evaluation and directions for further study.
综述了超细氮化铬粉体的用途、制备方法，着重介绍了近年来超细氮化铬粉体的制备方法的研究进展，分析了各种方法的利弊以及以后的研究方向。
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