Due to low copper recovery in magnetic separation of tailings in a dressing plant of Shandong, the concentration test researches are made.
针对山东某选矿厂的磁选尾矿铜回收率偏低的情况进行了选矿试验研究。
According to pickling technology, this article provides effective methods for the acid concentration test and strip quality control in Turboflow pickling.
本文就酸洗工艺，对紊流酸洗酸液浓度检测及带钢酸洗质量的控制等提供了行之有效的方法。
The nervousness they feel before a test can be so strong that it interferes with their concentration or performance.
他在考前所能感受到紧张程度足以影响他的考试表现和注意力集中与否。
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