通过对全国民航航行情报业务需求的分析，明确系统要实现的重点及难点所在。
It also defines the importance and the difficulty that the system will solve through the demanding analysis of the entire aeronautical information business of CAAC.
通过对全国民航航行情报业务需求的分析，明确系统要实现的重点及难点所在。
It also defines the importance and the difficulty that the system will solve through the demanding analysis of the entire aeronautical information business of CAAC.
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