plain suction dredger

例句：

1. 1. The plain suction dredger is used to clear riverbeds of silt and debris.
   平吸式疏浚船用于清除河流床的泥沙和沉积物。
2. 2.The plain suction dredger was the first to be developed for this purpose.
   平吸式疏浚船是第一个为此目的而开发的。
3. 3. The plain suction dredger is an essential tool for maintaining navigational channels in busy ports.
   平吸式疏浚船是繁忙港口维护航道的关键工具。