Also, the difference in pressure between any two points in a bed is roughly approximated by the static head of bed between these points . 还有,床层中任意两点间的压差大致等于这两点间床层静压头。
The liquor is pumped through a large nozzle and the velocity head is utilized to draw the gases to be absorbed into the liquid . 液体用泵送经一只大的喷头,利用速度变化产生的压差将待吸收气体带到液体中。
The verifing method of a relativey pressure gauge and discuss 微压差表校验初探
The maximum differential pressure across the valve seat 通过阀门阀座的最大压差。
After memory is set , disconnect differential gauge 记忆设置后,断开压差表。