pses = pretreatment standards for existing sources
Related Translations:
现存: extant; in stock; existing 短语和例子现存的手稿 extant manuscripts; 我们有多种现存的式样供你选择。 we have many patterns in stock for you to choose from.; 现存货 in stock; 现存市场 existing market; 现存物资 goods and materia