Negative pressure, air going in one way not coming out, need a tube.
A smoke test can help determine whether a room is under negative pressure.
I've always felt that the negative pressure from my parents made me even more determined to love this music.
Negative pressure now needs to be followed by positive encouragement.
Then the doctors explained that both positive and negative pressure were necessary.
Both models include the common characteristic that dark energy must have negative pressure.
A girl might still feel negative pressure from her peers if she's the best one in the math class.
I don't like cases with big negative pressures and lots of exhaust.
Sometimes fluid or negative pressure gets stuck in the middle ear.
In this way, increased wall suction does not increase the negative pressure of the system.
