详细论述铝青铜材料的研究与应用现状，分析存在的问题。
The present research and application situation of aluminum bronze is discussed in detail, and the existed problems are analyzed.
介绍高分子精密微孔过滤技术、 过滤机结构与性能、应用现状，分析其在工业中的应用前景。
The polymer micro porous filter technology and its applying situation, the structure and characteristics of the filter are described, and the industrial application prospect is predicted.
阐述了混合气体在熔化极气体保护焊中的应用现状，分析了保护气体成分的不同配比对熔化极气体保护焊的焊接工艺性能、焊接质量的影响。
This paper illustrates the applications of mixed gases in GMAW and analyzes the different proportion of shielding gas impacts on the welding technics performance and quality in GMAW.
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