ZPG series have wheel scraper-type vacuum filter , DZG Series Horizontal belt vacuum filter .
还有ZPG系列转盘刮刀式真空过滤机，DZG系列水平带式真空过滤机。
2
The paper describes the whole configuration system of disk vacuum filters and the main technical parameters of ZPG series disk vacuum filters.
介绍了盘式真空过滤机的全套配置系统和ZPG系列盘式真空过滤机的主要技术参数。
3
This paper deduces a theoretical population model in a urban system under a hypothetical condition of zero population growth (ZPG), and analyses the population dynamics for the model.