It is the unreasonable entry ordering of the vessels that results in the navigation time delay of the deep-water channel.
对申请进出深水航道的船舶安排次序时未能采用合理的排序方法，造成进槽船舶在深水航道航行时间延误。
According to the analyses, the North Channel is selution as the main deep-water navigation channel to the sea and is to be pre-trained, and the training principle of the Yangtze Estuary is determined.
在长期系统研究的基础上，分析对比了长江口的水流动力、泥沙运动和河床演变等各种条件，选择了北槽作为长江口深水航道先予治理，确立了符合长江口实际情况的治理原则。
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