back pitch

英 美
  • 后节距,背景距
  • back n.后面;背脊;靠背;后背;后卫vt.支持;后退adv.向后地adj.向后的;后面的;偏远的;过时的;积欠的
  • pitch n.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
    1. Convolutions frequently alternate in direction of rotation and vary in pitch.
      盘旋经常改变回转方向和节距。
    2. The straightening effect of straightener can be improved along with the change of pitch.
      采用改变节距的方法,提高矫直机的矫直质量。