GOGOGO在线观看免费观看完整版高清,欧美性猛交XXXX乱大交极品,风韵多水老熟妇口爆69式,亚洲av成人中文无码专区,免费观看18禁无遮挡真人网站

Welcome to Dabang official website!

TEL:13906146128

Landscape water recycling treatment

Landscape water usually refers to water bodies used for visual appreciation. It is usually divided into two categories: one is natural waterscapes, such as natural lakes and rivers, and the other is artificial waterscapes, such as fountains, artificial lakes, and small urban rivers. It is surface water in the open air, with very low self-purification ability, and it is very susceptible to pollution. Engineering measures to improve and maintain landscape water quality to meet specified standards with lower investment costs and operating costs; landscape water usually includes ponds, artificial lakes, small rivers flowing through cities, etc., landscape water management needs to be adapted to local conditions and integrated management , Commonly used methods include physical method, biological method and ecological method.
Based on the specific characteristics of different projects, our company can adopt air flotation treatment, filtration disinfection treatment, and biological-ecological treatment to ensure that the landscape effects of clear water, beautiful scenery and fish swimming are achieved.
2020/12/05 10:53:57 2240 次

Copy right ? 2020 Jiangsu Dabang Environmental Construction Co., Ltd. All rights reserved