因我厂硬度计银屏漆有脱落现象,致使测量标尺的投影模糊,影响硬度计的视值精度,对操作者的视力也易疲劳。后来,307厂来我厂进行计定工作过程中,作了试修,方法是:先用脱脂棉沾少许汽油,擦去银屏上的污垢,然后涂一层薄而均匀的浅色硝基 Due to my factory hardness tester silver paint shedding phenomenon, resulting in the projection of the measuring rod fuzzy, affect the visual accuracy of the hardness of the operator’s vision is also easy to fatigue. Later, 307 factory to my factory for the determination of the work process, made a trial, the method is: first with cotton wool moisten a little, wipe the silver screen dirt, and then coated with a thin and uniform light-colored nitro