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 and puttn.小场地高尔夫球pitch notation音调符号pitch movement音调变化pitch sequence音高序列pitch template螺距样板pitching angle仰俯角pitch tracking基音周期提取pitch polishing沥青抛光模具pitch absorbent树脂吸附剂pitch of rivets铆钉间距,铆钉距