Drainage open ditch明渠排水
Drainage e Ditch排水沟
drainage blind ditch排水盲沟
design of drainage ditch排水沟设计
depth of drainage ditch排水沟深度
drainage ditch on raisedridge畦埂渠沟
farm drainage ditch排水毛沟
certified drainage ditch合格排水沟
surface drainage ditch地表排水沟
Domestic sewage discharged Shi Bao town has the characteristics of high nitrogen, medium phosphorus and low organic matter concentration with the low carbon nitrogen ratio. (2)Enhanced ditch is a purification trentment facility using drainage ditch to treat sawage.
强化沟渠是一种通过合理改造排水沟渠处理污水的净化处理设施。
参考来源 - 三峡库区山地小城镇生活污水沟渠强化处理的试验研究