normal pressure and temperature in a sentence

1. It must also be stored under normal pressure and temperatures.
2. The two allotropes that are encountered at normal pressure and temperature, ?-tin and ?-tin, are more commonly known as " gray tin " and " white tin " respectively.
3. It is easy to implement measures of flow rates of commingled, single phase hydrocarbon flows under normal pressure and temperature, but often not feasible to measure the individual well flow rate of multiphase streams from oil wells, under high temperature and pressure, while achieving known and acceptable uncertainty in the measurements.
4. It's difficult to find normal pressure and temperature in a sentence.