结合9801型脱砷剂的应用过程及实际生产运行数据,介绍了9801型丙烯脱砷剂在我厂丙烯精制中首次工业应用的效果. The first industrial application of 9801 propylene de - arsenic catalyst in Harbin Petrochemical Company was described.
The disadvantages of the pharos and avigation obstacle lights are analysed in the paper.详细分析目前航标灯和航空障碍灯存在的主要问题.I stepped back and analysed the situation.我抽身出来，从局外人的角度分析了形势。The present world crisis should in principle be ...