摘要：城市排水与人们的生活息息相关。排水系统是城市基础设施的组成部分，对城市居民的生活有重大的影响。生活污水中含有很多有害物质，不仅污染环境，而且还危害人们的生产和生活；天然降水如不及时排泄，也会困扰人们的生产和生活。然而，污水如果有系统地收集、排除并进行适当的处理和利用，便可变废为宝，造福人类。本文将从排水系统的组成及设计方法等方面进行研究分析。 关键词：城市化学膨胀螺栓>接种棒 封装外壳排水系统设计方法
塑料光纤收发器
abstract: urban drainage and people’s life. drainage system is part of the urban infrastructure, urban residents’ life have significant influence. life sewage containing many harmful material, not only the pollution of the environment, but also endangering people’s production and life; the natural rainfall if it does not discharge, also to be troubling people’s production and life. however, if there is a system to collect sewage, eliminate and proper treatment and utilization, can reuse, benefit human beings. this paper from the drainage system composition and design method of research and analysis.超高压电容
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