The depth of the river is maintained by dredging.
通过疏浚保持河道的深度。
The treating probe acts pulse voltage waveform together with hot water directly on body to generate great area and depth dredging effect to repair nerve and promote blood circulation.
其探头将脉冲电压波形协助探头内的温水直接作用于人体，产生大面积足够深度电按摩的明显疏通效果，彻底修复神经，促进血液循环使气血畅通。
When a clamshell dredger is used to carry out over-depth and over-width dredging, accuracy control is always one of the difficulties.
抓斗式挖泥船进行超深超宽施工时，精度控制始终是难题之一。
When a clamshell dredger is used to carry out over-depth and over-width dredging, accuracy control is always one of the difficulties.
抓斗式挖泥船进行超深超宽施工时，精度控制始终是难题之一。
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