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 on a day随便挑选一个日子pitch forecast基音周期pitch of bolts螺栓间距pitch matching音调匹配pitching model俯仰模型,相对横轴振动试验模型pitch patterns音高模式pitch of screw螺纹距pitch grouting硬沥青灌浆pitch attitude俯仰姿态pitch response俯仰反应