main drainage pipeline

基本解释

The material requirement, main equipment and work conditions are indicated for brushing of drainage pipeline.
指出涂刷排水管道的材料要求、主要机具及作业条件。
In this paper the application of high pressure water jet technology in coal mine main drainage pipeline is discussed briefly.
简要探讨了高压水射流清洗技术在煤矿主排水管道清洗中的应用。
Through calculation of concrete instance, it is clear that coal mine main drainage pipeline cleaning by high pressure water jet has remarkable economic benefits.
最后通过对具体实例的计算，说明了清洗煤矿主排水管道具有显著的经济效益。