The invention has simple process, little pollution in the preparing process and low producing cost.
本发明工艺简单，生产过程污染小，生产成本低。
The invention is simple technics, low power consumption, short producing time and low environment pollution.
具 有工艺简单、耗电量少、生产时间短，减少了环境污染的优点。
The method is simple and the producing efficiency is high.
本发明的制造方法简便，生产效率高。
The preparation method in this experiment of producing active Al_2O_3 is simple and economical.
本实验方法生产活性氧化铝的成本低，简单易行。
The preparation method in this experiment of producing active Al_2O_3 is simple and economical.
本实验方法生产活性氧化铝的成本低，简单易行。
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