The temperature of a high temperature, high pressure plume solid propellant rocket engine is difficult to measure but is useful for determining the combustion status of the engine.
对于固体火箭发动机羽焰温度的测量是困难的，了解其温度分布对于研究发动机内燃烧流场的特性有重要价值。
Coal combustion on atmosphere pollution status and control technology of pollution is analyzed and the research direction of pollution control is put forward in this article.
针对煤燃烧对大气的污染现状及污染控制技术进行了分析，并提出了污染控制的研究方向。
The market status of automobile and internal combustion engine oil in Japan in recent years was presented. And the data on automobile and road in developed country were listed.
介绍了近年来日本汽车和内燃机油的市场情况，并列出了有关发达国家汽车和道路的数据。
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