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2007年长江航道工作的主要指标是:航标维护正常率达999‰,航道水深保证率达到标准,无任何航道维护责任事故发生;基本建设投
The main indicators of the work of the Yangtze River waterway in 2007 are as follows: the normal maintenance rate of aids to navigation aids is up to 999 ‰, the water depth assurance rate of the waterway reaches the standard, and no waterway maintenance responsibility accident occurs; the capital construction investment