着重说明了车削淬火钢件时，如何通过合理地选用刀具材料、刀具几何参数及切削用量达到理想的切削效果，并提出车削淬火钢件时应注意的若干问题。
The author gave us the reasonable selection of tool materials, tool parameters and cutting parameters during turning of hardened steel in order to get the ideal cutting result.
另一方面，随着垃圾肥用量的增加，土壤全盐含量上升，因此在施用垃圾肥时应注意土壤盐分的累积。
On the other hand, the more the amount of rubbish compost applied, the higher the soil salt. S...
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