At this moment there are no hydraulic piping stand- ards available which cover different pressure classes and piping materials as well as being gener- ally suited for all applications.
A high concentration simply means there is a high percentage of solute particles dissolved in the solvent and the solution is said to be concentrated. And a low concentration means there is not a high percentage of solute particles in the solvent and the solution is said to be diluted. high concentration of something, like a hormone in the blood, means there is a lot of it. A low concentration of something means there is not a lot of it, but a little.
area of concentration definition, area of concentration meaning | English dictionary. area. 2 the area from which people are allocated to a particular school, hospital, etc. 2 an area that is barred to certain individuals, groups, etc. n (Austral. and N.Z) a motorists' stopping place, usually off a highway, equipped with tables, seats, etc.