The loss of vacuum pressure will result in a reduction of braking force and a hard brake pedal, increasing the risk of a motor vehicle crash. (bestride.com)
What's more, a single knob controls the speed and vacuum pressure for maximum comfort. (tinyfry.com)
The cup is connected to an electric suction pump or a small handheld pump that creates vacuum pressure to hold the cup securely to the baby's head. (babycenter.com)