论文部分内容阅读
水经过净化后,水质的优劣主要是出水的浊度高低。我们为提高水质,采用分段投药法。现将试验陈述如下:
After the water is purified, the quality of the water is mainly the turbidity of the water. In order to improve water quality, we use a sub-administration method. The test is stated as follows: