The present situation of development and application of master alloy refiners and mechanism of grain refinement in aluminum alloys was analyzed and discussed.
分析讨论了中间合金对铝合金晶粒细化处理的研究与应用现状及其细化机理；
This paper introduces the present situation of development on the sensor-fuzed munition for destroying armoured targets in large areas, and studies the problems existing in the development process.
本文介绍了用于大面积反装甲的末敏弹的研制现状，并且综述了末敏弹研制中的问题。
In this paper, the present situation of development and application, as well as the main technical performance and production process of fly ash silicate industrial wall panel in China is introduced.
本文介绍了粉煤灰硅酸盐工业墙板在我国的研制和应用现状，粉煤灰硅酸盐工业墙板的主要技术性能和生产工艺流程。
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