倍数的

15, 20, or any multiple of five.

15、20或任何5的。

The overall height of catalyst bed as well as the optimal feeding point was obtained for different detritiation efficiency under specific mass transfer coefficient of catalysts.

据不同的催化剂传质性能,计算了为达到特定脱氚率和电解池浓缩所要求的交换总高度和进液位置。