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2) Analyzed the abrasion of grain in printing and found the changing rule of grain abrasion by experiments.
2)通过实验对PS版砂目磨损的现象进行分析，找出其规律。
参考来源 - PS版质量检测的理论与实践研究·2,447,543篇论文数据，部分数据来源于NoteExpress
针对印刷中砂目和感光层的磨损，采用因子设计法设计实验，保证了实验的准确性。
For the PS plate grain and light-sensitive coating abrasion, an experiment was designed based on factor design, which ensures the veracity of experiments.
影响PS版砂目结构的因素有交流电的电流密度、电压、波形、 频率、电解液成分及其浓度和温度等。
The factors influencing the roughness of aluminium surface are current density, voltage, waveform, frequency, the component and concentration of the electrolyte and it's temperature.
这种涂料的主要耐火骨料是75~200目铬铁矿砂、 镁砂、 刚玉砂等。
The main refractory of the coating consists of the 75~200 mesh chromite sand, magnesite and corundum sand.
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