two focal points,two of the major points of the line set by

One central task and two basic points is the primary coverage of the Party s basic line in the present stage.

一个中心、两个基本点,是党在现阶段基本路线的主要内容。

Approach to possibility of applying double-absorption process to low-SO_2 gases;

低浓度二氧化硫烟气采用两转两吸的可行性探讨

Conversion and absorption efficiency of double-absorption process;

两转两吸的转化率与吸收率