“the PU-ballast bed techique”的概念、定义、翻译、参考文献-科学参考

单词	the PU-ballast bed techique
释义	the PU-ballast bed techique Encyclopedia 工学[轨道部件]释 the PU-ballast bed techique聚氨酯固化道床利用聚氨酯发泡原理将其灌注到碎石道床中形成的弹性整体道床结构。
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