以下为句子列表：
英文: As the ponds are quite small and not very deep, it has been proposed that a single grab dredger be used for the operation.
中文: 由于池塘面积较小而且水不太深，已建议在操作时使用单抓斗挖泥机。
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英文: The dredger spooned up mud.
中文: 挖泥船把泥挖起来。
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英文: The necessity of the Yangtze Estuary Waterway Administration Bureau's purchasing of specialized trailing suction hopper dredger is analyzed, and suggestions on the way of building of the dredger are put forward.
中文: 摘要对长江口航道管理局购买专用耙吸式挖泥船的必要性进行了分析，并对专用挖泥船建造方式提出了建议。
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英文: To predict the multiple dynamic behaviors of the suction pipe system of a trailing suction hoper dredger (TSHD) when it is dredging at sea under the un-quiet conditions, the forces acting on the system should be analyzed accurately.
中文: 摘要为预测耙吸式挖泥船远海施工时耙吸管系统在非静态环境中的多体动力学行为，要求准确分析作用在该系统上的力。
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英文: Where tight dredging depth tolerances are required to dredge contaminated materials the bucket-type closed-grab dredger shall incorporate a visor.
中文: 在挖掘受污染物料时，若严格规定了挖泥深度容限，则密封抓斗式的挖泥机应设置一个护罩。
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