中国危机处理的有效储备系统缺位。
China's effective reservation system on dealing with crisis is ineffective.
实践证明，该模型有效地提高了航材管理的水平和航材储备资金的利用率。
In practice, this model is helpful to improve management level and efficiency of fund.
实践证明，该模型有效地提高了航材管理的水平和航材储备资金的利用率。
In practice, this model is helpful to improve management level and efficiency of fund.
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