久久黄色一级级视频,亚洲一级免费一级毛片,成人一级黄片免费观看,日韩一区一区二区

This machine is mainly used to detect the rotation strength of the grinding wheel, and is equipped with a liquid crystal digital tachometer to display the instantaneous speed.

When the operator presses the button, the host can operate according to the preset speed control curve, and automatically complete the functions of acceleration, delay, speed reduction, stop, etc., and has a safety lock protection function.