pitchupn.上仰
pitchn.球场;程度;音调;推销;投掷;街头商贩摊位;沥青;树脂;松脂v.投;颠簸;搭帐篷;定调;推销;用沥青覆盖
pitching system俯仰系统
pitching flying俯仰飞行
pitch gyroscope俯仰陀螺仪
pitch fibrepipe沥青纤维管
pitch frequency音调频率
Pitch disorders音调障碍
pitch smoke dust沥青烟尘
pitch shortening绕组节距缩短
pitch correction螺距修正,俯仰修正