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1·Universal gearbox allows inch, metric, diametral, and module pitch threads without changing gears.

通用变速箱允许英寸，公制，直径，螺距螺纹和模块不改变齿轮。

2·The machine can turn about 200 kinds of the metric, imperial, module and DP thread with knob, no need to change gears.

本机可以打开约200多种的公制，英制，模块和DP螺纹旋钮，没有必要改变齿轮。

3·The machine can turn about 200 kinds of the metric, imperial, module and D. P. thread with knob, no need to change gears.

本机可以把约200种的公制，英制，模块和DP螺纹旋钮，没有必要改变齿轮。

4·Calculating formulae for selecting gears in the gear box is provided for machining various threads of metric or British system.

加工公、英制螺纹时，并提供如何计算和选择该装置齿轮箱的齿轮。