Pitchon皮琼
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
pitch of holes钻井倾角,孔间距
pitch a circus临时搭棚卖艺
pitch pavement沥青路面
pitch polisher沥青抛光机
pitch constant节距常数
pitch troubles沥青障
pitch of chain链环距
pitching stone铺砌片石
pitched battlen.激战
pitch concrete沥青混凝土