active surface

The solvent is to oversize piston weight and to reduce the effective action area.

解决的办法是增加活塞重量和减小有效作用面积。

Most of studies overlooked sleeve type ejection gun and the effect of pressure area changes,simultaneously the models of ejection gun were lack of extensity.

以往研究中对多级弹射筒和压力有效作用面的影响重视不足,并且所建模型通用性差。

The specific surface area of copper in the Cu Zn Al catalyst was determined by pulse chromatography using N 2O as chemical adsorption medium.

以Ｎ２Ｏ为化学吸附介质，在２０℃下采用色谱脉冲法测定Ｃｕ－Ｚｎ－Ａｌ催化剂中活性铜的有效表面积。