国产精品爽爽ⅴa在线观看_色8欧美日韩国产无线码_日韩欧美人妻视频_免费人成视网站在线不卡

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.