empty sums中文什么意思

例句与用法

1. second, step into the electrical frequency and the empty affect empty sum frequency
   二步进电机的空载牵入频率和空载牵出频率？
2. empty sum frequency is entered in the normal functioning of the electrical pulse frequency gradually rise to the highest frequency step electrical bad step
   空载牵出频率是指步进电机在正常运转情况逐渐升高脉冲频率使步进电机不失步的最高频率。