Consumer upgrades and demographic dividend double stack, to create a better atmosphere for industrial growth.

消费升级和人口红利的双重叠加，营造出更好的产业成长氛围。

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The results show that the double stack transport of large containers can improve the transport efficiency by 30%.

结果表明，大型集装箱双层运输可将运输效率提高30 %。

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Based on analyzing security factor of double stack container cars, it has designed the operating condition under factual condition.

本文分析了影响双层集装箱车运行安全的主要因素，根据实际情况设计了双层集装箱车运行的不利工况。

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