Then the doctors explained that both positive and negative pressure were necessary.
They create an expectation of excellence in the players, and it's a very positive pressure.
I'm at full positive pressure and the vacuum is growing.
That cushion is always under positive pressure, even at rest.
Pressure-type systems, in which a positive pressure is used to push material from one point to the next.
Only excess positive pressure from within the brain should result in drainage.
So far, the positive pressure was keeping his breathing supply clean.
When the attack begins outside the building, the experts say, among the most important measures is "positive pressure."
To move air, either a positive pressure or a vacuum must be created.
This is accomplished by creating positive pressure inside the container.
