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。
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.
试验了不同节距的螺旋扭状钢筋的粘结锚固性能。
The bond anchorage properties of the rolled and twisted bars with different pitch of twist were studied.
试验了不同节距的螺旋扭状钢筋的粘结锚固性能。
The bond anchorage properties of the rolled and twisted bars with different pitch of twist were studied.
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