短语词组短语viscous -drag gas-density meter [流]粘滞阻力气体密度测量器viscous pressure drag 黏性压差阻力viscous drag pressure surge 粘阻压力激动viscous drag effect 粘性阻尼效应viscous drag brake 粘滞摩擦制动器viscous drag effects 粘性阻尼效应 返回 viscous drag