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 order节距排列
pitch tee Y形三通接头
pitchpocket树脂束powderpockets粉块,粉瘤
pitch ratio螺距比
pitch-row孔距
pitch fault节距误差
pitch angle螺旋角,螺旋上升角,节面角
pitchblenden.沥青油矿
pitch plate斜板
pitch curve分度曲线,齿轮节线,啮合曲线