sewer gas

1. Security Monitoring and Early Warning System for Municipal Sewer Gas Based on GPRS
   基于GPRS的市政下水道气体安全监测预警系统
2. Development and Application of the Monitoring and Early Warning System for Urban Sewer& Septic Tank Combustible Gas
   城市下水道及化粪池可燃气体监控预警系统研制与应用
3. A U-shaped section of drainpipe that holds liquid and so prevents a return flow of sewer gas.
   一种用来盛液体的并且用来防止污气回流的排水管的U-形部分。
4. Monitoring method for combustible and poisonous gas from urban sewer, including gas leakage source, main composition, and concentration was introduced. It provided scientific and effective basis for precluding gas explosion and protecting personnel from poisoning.
   介绍了调查城市下水道内可燃有毒气体的泄漏来源、主要成分及浓度的方法，为紧急排除下水道危险气体泄漏引发的爆炸、人员中毒等事故提供了科学有效的依据。
5. Assay on the Harmful Volatile Components of the Refined Waste Edible Oil Gained from the Restaurant Sewer by Static Headspace and Gas Chromatography/ Mass Spectrometry
   精炼餐饮业地沟油挥发性危害成分的GC/MS静态顶空分析
6. Fundamental monitoring methodology of sewer gas and the design of monitoring device for flammable sewer gas.
   下水道可燃气体监测的基本方法的研究；

noun

1. foul-smelling gas that forms in sewers