地下污水渠 meaning in English
underground sewer
Examples
- Here could be methane , hydrogen sulphide and other toxic gases in confined spaces like manholes and sewers . before starting work , it s necessary to conduct a risk assessment and air testing by a competent person
沙井和地下污水渠这些密闭空间会有沼气硫化氢等毒气，开工作前要由合资格人士做危险评估，同埋空气测试