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通过对国产与进Ｄ的同类型精密镗削头振动模态实验研究，找出了这两种精密镗削头的固有振动频率，给出了它们的各阶动画振型图．从这一侧面解释了国产精密镗削头回转精度偏低的原因。
Through the experimental study on the vibration modes of the domestic and foreign advanced precision boring heads, the natural vibration frequencies of these two kinds of precision boring heads are found, and their vibration modes are given. From this side of the domestic precision boring head explains the reasons for the low accuracy.