You can also lay your baby on his back and gently press his knees into his chest to relieve gas pressure. (howtoadult.com)
In variable output systems such as automobile engines, exhaust gas pressure at idle, low engine speeds, or low throttle is usually insufficient to drive the turbine. (en.m.wikipedia.org)
In the past, it's been hard to put magnetic fields in context with other influences on a star, such as gas pressure and gravity. (seeker.com)