S. P. C. company is specializes in research, development, production and sales of cement admixture.
公司专门从事各种水泥外加剂的研究开发、生产与销售。
The research and development on shaft type D. C. arc furnace charging of once for all were introduced.
介绍了一次加料式竖炉型直流炼钢电弧炉的研究、开发。
The paper summaries the research and development of high-thermal conductive C/C composites.
综述了高导热C/C复合材料的研究现状及进展。
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