本powerpoint演示文稿首先简要概述了二次或双水系统以及二次水系统的计量。介绍了几种计量方法，包括:集中过滤；单个连接过滤器；以及创新的仪表设计。对经济可行性、社会和政治影响提出了重要考虑。目前的二次水处理结论表明 系统不利于保护； 大多数类型的仪表都无法正常工作 二次系统； 采用创新的仪表设计或 过滤、计量是一种可能性；和 在这之前应该进行经济分析 在辅助系统上安装仪表。包括5个参考文献、表格、图表。

This powerpoint presentation begins by providing a brief overview of secondary or dual water systems and metering of secondary water systems. Several approaches to metering are presented, including: centralized filtration; individual connection filters; and, innovative meter design. Important considerations are presented for economic feasibility and social and political implications. Presentation conclusions indicate that: current operations of most secondary water systems are not conservation-friendly; most meter types are unable to function in secondary systems; by using innovative meter design or filtration, metering is a possibility; and, an economic analysis should be made before installing meters on a secondary system. Includes 5 references, table, figure.