pump dredge

基本解釋

Wood can also be used percussion hammer approach, combined with positive and reverse pump to dredge;
也可用木錘敲擊的方法，結合正、反轉泵，使之疏通；
blog.sina.com.cn
This paper presents associated technology design and application of a dredge pump unit in the rehabilitation project in Cline Shipyard, Sierra Leone.
在塞拉利昂克萊恩船廠滑道改建工程中，對吸泥泵組的配套工藝設計及使用情況作以介紹。
One would create two basins one on top of the other The space between the two basins would allow a dredge pump to access the bottom of the lower basin.
你要做兩個盆子，一上一下。兩個盆子之間的空隙能讓泥泵通到下面盆子的底部。