main drainage pipeline

基本解釋

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、主要機(jī)具及作業(yè)條件。
In this paper the application of high pressure water jet technology in coal mine main drainage pipeline is discussed briefly.
簡要探討了高壓水射流清洗技術(shù)在煤礦主排水管道清洗中的應(yīng)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.
最后通過對具體實(shí)例的計(jì)算，說明了清洗煤礦主排水管道具有顯著的經(jīng)濟(jì)效益。