用一定厚度的校准片进行标定，是X射线测厚设备使用前必须完成的关键工作。
In order to measure thickness accurately, it's important for the X-ray thickness measurement equipment to be demarcated using some reference samples.
用一定厚度的校准片进行标定，是X射线测厚设备使用前必须完成的关键工作。
In order to measure thickness accurately, it's important for the X-ray thickness measurement equipment to be demarcated using some reference samples.
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