复数： dredgers

Research about dredger structure design methods inland and abroad .

国内外挖泥船结构设计方法探讨。

The current technological situation of combined mining with bulldozer and gold dredger and approaches to its perfection .

推土机-采金船联合开采的工艺现状及其完善途径。

The turbidity of the water , nutrient concentrations and concentrations of heavy metals may increase downstream the dredger or downstream outlet points from reclamation areas and in turn affects flora and fauna .

而水的混浊度、营养物浓度和重金属浓度可能增大疏浚机工作的下游范围或围垦区域下游出口点的距离，由此对动植物产生影响。

The dredger spooned up mud .

挖泥船把泥挖起来。

The study of crisis management of dredger operation by using operational risk management .

运用作业风险管理探讨挖泥船作业危机管理。