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对鸭绿江口的自然条件及其特殊的地理位置,简述了鸭绿江西水道治理工程开工及前期各项工作的准备进展情况。
The natural conditions of the Yalu River estuary and its special geographical location, outlined the Yalu River waterway control project started and preparatory work for the progress of the preparatory work.