difference between the (static) pressures measured at the wall pressure tappings, one of which is on the upstream side and the other of which is on the downstream side of a primary device, inserted in a straight pipe through which flow occurs, when any difference in height between the upstream and downstream tappings has been taken into account, erinevus staatiliste rõhkude vahel, mis on saadud mõõtmisel toruseina mõõtekohtade juures, millest üks asub ülesvoolu ja teine mõõtevahendist allavoolu poolel, sisestatuna sirgesse vootorusse, kui on arvesse võetud kõrguste erinevust üles- ja allavoolu rõhumõõtekohtade vahel, pressure difference generated by a primary device when any difference in datum level between the upstream and downstream pressure tappings is taken into account, esmaseadme tekitatud rõhuerinevus, kui arvesse võetakse voo sisse- ja väljavoolu kohtades rõhuühenduste vahelist näiduerinevust

temperatuur, milleni jahtudes õhus leiduv veeaur muutub küllastunud auruks, temperature to which air must be cooled to become saturated with water vapor, temperature to which a given parcel of air must be cooled, at constant barometric pressure, for water vapor to condense into water, temperatuur, millele antud õhukogus tuleb jahutada pideval rõhul, et veeaur kondenseeruks veeks