There was also insufficient pressure in the airbag to prevent the driver's head from bottoming - out against the steering wheel. (euroncap.com)
Insufficient pressure lowers air density, thereby decreasing the amount of available oxygen. (businessinsider.com)
«Anal glands fill for a number of reasons: most commonly when the dog's stools are soft (for example, after a few days of diarrhea), so insufficient pressure has been exerted to empty the glands. (ctvsh.com)