Библиотека

— A narrow-edged orifice in a plate used in the calculation of fluid flow rates by measuring the pressure difference across the orifice.

— A gas analyser based on separate absorption of CO2, O2, etc. by separate chemicals that have an elective affinity for each of those gases.

— When one side of a semi-permeable membrane (permeable to a solvent, impermeable to a solute), is in the presence of a solution, the other side being in the presence of the pure solvent, the osmotic pressure is the pressure which must be applied to the solution in order to prevent the solvent diffusing through the membrane.

— Air taken from outside a building to replace all or part of the air in a conditioned space.

— Characteristics of the air prevailing outside a room or air conditioned space.

— For each element of a control system, a physical quantity whose changes are governed ultimately by the functioning of the element.