低气压
4.An elongated region of relatively low atmospheric pressure, often associated with a front.
7.air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure.
8.A STUDY ON THE ELECTRIC PROPERTIES OF TITANIC OXIDE COATING IN LOW PRESSURE PLASMA SPRAYED WITH TiO_2
9.a local region of low pressure or descending air that causes a plane to lose height suddenly.


