The spindle speed of CA6140 remains the manual function of shifting gears. The alteration is easy and it can reduce labor intensity and improve productive efficiency.
CA6140车床主轴转速部分保留原车床的手动变速功能，改造简单易行，可降低劳动强度，提高生产效率。
The information is obtained through measuring the rotational errors of spindle, so they are reduced but epsilon-entropy yet remains.
文中推算了残留熵的计算公式、表示测量误差淹没信息作用的测量误差熵值和熵系数。
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