Determination of the right perforating pressure differential in water injection wells;

The pressure differential of the Co-Mo catalyst bed of hydrogenation reactor was 4.

The corrected coefficient K is in-troduced and calculated in the manner of single steam generator to single well,by which the steam flow rates in different chokes,temperatures,pressures and pressure differentials are gained using choke-pressure differen-tial equation.

Solution to the influence of the intermittent local ventilation on the pressure difference between rooms in a pharmaceutical workshop;

Study on testing water head loss of water pipe by the high - precision pressure difference test meter;

Reasons and countermeasures of pressure difference of ionic membrane electrolyzer;

Investigation on the increasing rules of differential pressure during the operation of filter;

Overflow valve differential pressure and max. permissible differential pressure of Roots vacuum pump;

During underbalanced drilling,the design of underbalanced differential pressure is very important.

In the experiment of determination of flow resistance of single phase,one of the experiments of chemical theory,there were two methods to determine the pressure drop.

When the Tcho<60℃,the hydraulic oil fluidity was the most important factor that influenced the pressure drop of the filter element,and the filtration resistance decreased quickly as the tempera.

The article is to analyze the reason of cavitation in the use of control valve, and brings forward the ways to control and reduce cavitation damage from inner structure ?allotting pressure drop and choosing material.