Acoording to instruction and experiment for many years, the authors introduced the formation causes of road freeze injury in freeze earth areas and give general prevention ways.

本文根据笔者的多年教学和设计实践。介绍了多年冻土地区公路冻害的成因及防治的一般方法。

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Hope to increase author the instruction on how to sell for the domestic shareware authors.

希望增加一些针对国内共享软件作者销售方面的指导。

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