According as formula of cutting surface mark deepness from educing, the paper explain that is really one another contradiction between tooth feed rate and cutting surface roughness.
文章首先以导出的锯痕深度公式为依据，说明每齿进给量与锯切表面光洁度两者之间确实是相互矛盾的。
This software can plot freely, draw any figure, mark dimension and tolerance, write symbols and draw surface-roughness symbols. It can also function as a mouse in digitalizer.
本文所述的交互式绘制零件图软件不用编写程序可描绘任意图形，标注尺寸及公差，书写字符及画表面粗糙度符号，并可起到数字化仪的鼠标器作用。
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