The technology of ultrasonic inspection is the mature application technology. It is widely used for the inner defect of mechanical parts.
超声波探伤技术是一项成熟的应用技术，在机械零部件内部缺陷检测方面得到了广泛的应用。
Seam surface defect after grinding or thickness is lower than base material after mechanical treatment.
打磨焊缝表面缺陷或机械损伤后的厚度小于母材的厚度。
If the comfort is affected by problems in the mechanical system, adjustments in electric parameters can only improve the comfort a little, but cannot substantially repair any mechanical defect.
如果机械系统方面存在着问题而影响舒适感的话，串行主板参数和变频器参数也只能是改善舒适感更好一些，而无法根本改变机械缺陷。
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