small pitch短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 🌏小间距 The resulting machining marks are, therefore, a helix having a very small pitch, which is equal to the feed. Consequently, the machined surface is always cylindrical. 所以，由此产生的机加工痕迹是一条具有很小节距的螺旋线，该节距等于进给。因此机加工表面始终是圆柱形的。 liuxuebaba