intro

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制备方法，绍了它在耐火材料中应用。

Oil pump speed regulation technology and the general principle for speed regulator slection are intro-duced.

绍了油泵调速调节技术和选择油泵调速装置一般原则。

The process of decoppering through insoluble anode electrolysis in the solution produced by leaching high grade matte nickel using chlorine is intro-duced in this paper.

本文绍了氯化浸出高冰镍用不阳极电解脱铜方法。