drag suction dredger

例句：

1. 1.The drag suction dredger is used to clean the riverbed and remove sediment.
   拖吸式挖泥船用于清理河床并去除沉积物。
2. 2. The dredger was designed to be lightweight and easy to operate.
   挖泥船设计轻便且易于操作。
3. 3.The drag suction dredger has become an essential tool for river management.
   拖吸式挖泥船已成为河流管理不可或缺的工具。