在较高切削速度时，存在一段使切削力最小的范围，切削时切削速度应尽量选在这段范围内，改善切削效果。
The minimum cutting force appears in a cutting speed range, the cutting speed is better in this range for the cutting performance improvement.
在较高切削速度时，存在一段使切削力最小的范围，切削时切削速度应尽量选在这段范围内，改善切削效果。
The minimum cutting force appears in a cutting speed range, the cutting speed is better in this range for the cutting performance improvement.
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