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采用单片机技术，通过控制步进电机来实现Ｘ射线校准实验室中自动更换标准辐射场的控制。该控制系统大大提高了工作效率，保证了靶位及过滤材料放置的准确性。
The use of single-chip technology, through the control of stepper motor to achieve X-ray calibration laboratory automatic replacement of standard radiation field control. The control system greatly improves the work efficiency, to ensure the accuracy of the target position and filter material placement.