it may also provide drainage and give added protection against frost action when necessary.
它具有排水作用,但在需要时也增加保护抗冻作用.
词典精选例句
但若混凝土在养护期内没有达到抗冻临界强度受到低温作用,其强度将降低。
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Distribution Law of Temperature Field and Research on Frost Heave Force Action on Tunnel Lining
季冻区隧道温度场分布规律及衬砌冻胀力分析
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