The method is: print the word, repeat print 10 times, with a magnification of 40 times to see, if coincidence, equipment qualified.
办法是：打印井字，重复打印10遍，用40倍放大镜看，假如重合，设备合格。
The method is: print the word, repeat print 10 times, with a magnification of 40 times to see, if coincidence, equipment qualified.
办法是：打印井字，重复打印10遍，用40倍放大镜看，假如重合，设备合格。
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