聪明的开头在你的工具箱里放一个螺距规。

Smart Start Keep a screw pitch gauge in your tool box.

此外，当螺距改变时，图像噪声亦呈现出规律性的变化。

In addition, the variation of pitch had some effect on the image noise.

采用螺距粗的螺丝和螺母实现螺纹型芯自动脱模。

A type of screw and nut with coarse pitch was applied to realize thread core demoulding automatically.

由此，推导出立轴柱形变螺距螺旋开沟机的临界转速。

Thus, Calculating the critical rotational speed of the helix ditching machine.

该程序一经调用，只要给出几个相关的参数，即可绘出变螺距螺旋面展开图。

Once the program is loaded, only a few parameters are given, the development drawings of variable pitch helical blade will be obtained.