在总结分析研究现状的基础上，对未来两相密封的研究方向进行了展望。
Based on the above review, the research directions of two-phase mechanical seals are proposed.
对事故过程突变模型的建立和突变分析研究现状进行了综述，并展望其发展趋势。
In this paper, up - to - date developments of catastrophical model and catastrophe analysis of accident - process are reviewed, and their future developments are prospected.
摘要：本文针对我国城市的空气质量现状及影响城市空气质量的主要因素进行分析研究。
Abstract: This article mainly analyze urban air quality present situation in China and the key factors affecting urban air quality study.
应用推荐