(meteorology) rapid inward circulation of air masses about a low pressure center; circling counterclockwise in the northern hemisphere and clockwise in the southern
a violent rotating windstorm
造句
An experimental investigation was made of the pressure drop ratio characteristics of oil-removing cyclones in a room bedstand. 在室內(nèi)試驗(yàn)裝置上對單錐除油型水力旋流器的壓降比特性進(jìn)行了試驗(yàn)研究。