求翻译：上面表中所写的锭子速度为50HZ时的锭子速度。当由变频更换转速时，锭子的速度随着频率的改变而改变。可以按照以下计算公式进行计算：是什么意思？

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In the table above the write speed of 50 spindles when HZ spindles of speed. When the frequency of replacement speed spindles, rotational speed, with the frequency change. It can be calculated in accordance with the following formula:

In above table writes the spindle speed is time the 50HZ spindle speed.When by frequency conversion replacement rotational speed, the spindle speed changes along with the frequency change.May carry on the computation according to the below formula:

In the table above written by spindle speed of the spindle speed is 50HZ. When frequency change speed, spindle speed of change as the frequency changes. Can be calculated according to the following formula: