This method of manufacture evolved out of a long process of trial.
这种制造方法是在长期试验过程中逐步形成的。
Process parameters were determined through the trial production for the manufacture of cement clinker by using the sludge of Suzhou river.
通过工业试烧确定了利用苏州河底泥生产水泥熟料的工艺参数，并对熟料及其水泥的性能进行了分析。
This paper mainly talks about the process trial, study and manufacture of phenolic FRP products with the property of anti-static electricity used in coal mine.
本文主要介绍供煤矿井下需要的防静电酚醛玻璃钢制品的工艺试验、研究及生产。
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