This paper introduces the main performance and moulding method of polypropylene series materials used in Santana Sedan and supplies the reference data for the localization of this material.
介绍桑塔纳轿车用聚丙烯系列材料的主要性能、成型方法，为该材料国产化提供了参考资料。
The first series of certified reference materials of iron ores to which 15 certified values are assigned was prepared.
研制了我国第一套铁矿石标准样品，确定了15个项目的标准值。
The first series of certified reference materials of iron ores to which 15 certified values are assigned was prepared.
研制了我国第一套铁矿石标准样品，确定了15个项目的标准值。
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