单词normal pitch
un.: 法向节距;标准螺距;标准距
网络: 法向齿距;法节;法线螺距
标准距
标准螺距
法向节距
Also, a curveball is usually a little bit slower than a normal pitch, so it throws the batter"s timing off.
此外,曲球的球速也往往比一般球慢一点,让打击者错过击球时机。
Analytical Testimony of the Amount of Modification Coefficients More Than Separate Coefficient of Normal Pitch Circle
角变位齿轮传动变位系数之和恒大于分度圆分离系数的解析法证明