方法：通过对一台CR设备进行一系列的维护与保养措施，观察对比其前后的运行状况，打印图像信息量的改变。
Methods Moving status of CR equipment and change of image information printed were observed after one CR equipment was maintained.
本论文的工作包括上述试验台的系统设计、安装、调试、操作保养规程的制订、试运转以及现场的实际检测和误差分析等内容。
The work of the paper is composed of the systematic design, mounting, adjustment, service manual, test run, actual test, error analysis, etc of the test apparatus.
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