1. There is a shallow boat for shooting the rapids of the Niagara.
这儿有一艘用做渡过尼亚加拉大瀑布的浅底船。
2. The calculation and the full scale test show that it becomes feasible for river ships to use tandem propellers on the channels with shallow water and many shoals and rapids.
计算及实船试验表明：在水浅、流急、滩多的内河航道上，船舶采用串列螺旋桨，是现实可行的较好的推进方式之一。
3. CHG series ship mounted drill rig is specially designed products that is suitable to drill blasthole for extending channel, removing submerged reef, rapids and engineering construction in shallow sea.
chg一系列船舶展开钻机是专门设计的产品是合适的钻探孔为扩展渠道，清除水下礁石，急流和工程建设的浅海。