The high actived surface or many chemical actived spots of ultrafinecalcinated coal kaolin are casier interact to surface modifiers, h…

机械力化学效应使煤系煅烧高岭土产生的高活性表面和化学活性点为其进一步深加工提供了有效途径。

Through the discussion of computing formula for measuring high resistance by Mdoel NG82-1impact corrent galvanometer, it is discoverde that it is much casier to do calculation by natural logarithm.

通过对NG82-1型冲击电流计测高阻计算公式的讨论，找到用自然对数计算较为方便。