discharge line

例句：

1. 1. The engineer carefully inspected the discharge line before repairing it.
   工程师在修理前仔细检查了排放管。
2. 2.The company has installed a new discharge line to improve water quality.
   该公司已安装一条新的排放管以改善水质。
3. 3.The chemical plant discharges pollutants into the river during operation.
   化工厂在运行过程中将污染物排入河流。