The progress of petrochemical "three agents"(catalyst, additive and process assistant) is summarized, the industrial application results of some of the products are described, and their major research trend is summarized.
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The results from several clinical trials have compared the advantages and disadvantages of these three agents. C…
多项临床试验对以上三种药物进行了研究，比较了它们的优缺点。
To reduce viscosity of raw starch size and enhance the adhesion ability to pure cotton yarn, starch reducing viscosity agent SPU was developed by three agents and suitable ratio.
为降低原淀粉浆液的粘度、提高淀粉浆液对纯棉纱的粘附力，利用三种助剂的协同作用，选用适当的配比研制开发了淀粉降粘剂SPU。
The optimization of the formulations of "three agents" has solved the practical problem of high cost in polystyrene production and improved the economic performance in enterprises.
通过对三剂配方的优化，解决了聚苯乙烯生产成本高的实际问题，提高了企业的经济效益。
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