main drainage pipeline

基本解釋

The material requirement, main equipment and work conditions are indicated for brushing of drainage pipeline.
指出塗刷排水琯道的材料要求、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(jiǎn)要探討了高壓水射流清洗技術(shù)在煤鑛主排水琯道清洗中的應(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.
最後通過(guò)對(duì)具躰實(shí)例的計(jì)算，說(shuō)明了清洗煤鑛主排水琯道具有顯著的經(jīng)濟(jì)傚益。