Methods The efficiency of purification was employed as standard, and the different menstruum dosage was studied.

方法以提取率为指标，分别对不同溶媒量进行研究。

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Cooperating with composite filter aid, vacuum filter help to improve the quality and efficiency of purification of machine oil.

在复配助滤剂的协同作用下，减压抽滤有助于提高液压油的净化效率、净化质量。

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Simultaneous desulfurization and denitrification tests were carried out in a flue duct, with the object of detecting the factors that effect the efficiency of purification.

在烟气管道进行了同时脱硫脱硝的实验，研究了影响脱除效率的若干因素。

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Over the course of the next year, the Team will employ local college students to maintain the program and monitor the efficiency of the water purification technology.

CNN: Students work to improve water quality in India