dihydric

1.The method and the condition of separation epoxy ethane from dihydric alcohol are discribed.

介绍环氧乙烷与元醇的分离方法和条件。

2.The Preparation method of cheap aluminium dihydric phosphate and its application in refractories have been intro-duced.

提供廉价磷酸氢铝的制备方法，介绍它在耐火材料中的应用。