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。
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。
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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