1.   A safety thermostat controls the water temperature, so ensuring constant pressure to give a consistent jet of cleansing steam.

2.   Helium was used over the fuel to maintain a constant pressure in the tank both at launch and during flight.

3.   It was important to try to maintain a constant pressure in both the fuel and oxidizer tanks during the flight.

4.   Maintain a little bit of constant pressure by driving against the chimney wall so that you stay still in one place.

5.   She initially refused, but ultimately relented under the constant pressure.

6.   The Survey was under constant pressure to cover as many square miles of ground as possible every year.

7.   She felt a constant pressure to earn more money.