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对于落后设备，必须改善设备的技术状况，提高其精度和性能，现以Ｍ２２０型磨床为例，对其磨头主轴进行改造设计，提高设备寿命和精度，可节约大量资金
For the backward equipment, the technical condition of the equipment must be improved to improve its accuracy and performance. Now, taking the M220 type grinder as an example, the grinding spindle can be modified to improve the service life and precision of the equipment and save a lot of money