With the increase of train speed, the frost hazard of subgrade engineering in seasonally frozen soil becomes more and more serious.
随着列车速度的不断提高，季节冻土区路基工程的冻胀问题也越来越突出。
With the increase of train speed, the frost hazard of subgrade engineering in seasonally frozen soil becomes more and more serious.
随着列车速度的不断提高，季节冻土区路基工程的冻胀问题也越来越突出。
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