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The method and the condition of separation epoxy ethane from dihydric alcohol are described.
介绍了环氧乙烷与二元醇的分离方法和条件.
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The Preparation method of cheap aluminium dihydric phosphate and its application in refractories have been intro - duced.
提供了廉价磷酸二氢铝的制备方法,介绍了它在耐火材料中的应用.
双氢的：每个分子有二个氢原子的???
英汉双解词典包含4367426条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。