英语语法分析

The effects of coal ranks, the temperature for sulphonating re-action, the sulphonating duration, the coal size etc on the characteristics of ions ex-change of sulphonated coal are tested.

实验考察了煤种、 磺化温度、磺化时间、煤粒度等因素对于产物磺化物离子交换活性的影响。