Through analysis on factors which impact on full hard sheet cleanness, we adjusted work roll roughness and optimized emulsion parameters and operation of emulsion system in practice.

通过对影响轧后板面清洁度因素的分析，在实际生产中，通过调整轧辊的粗糙度、优化乳化液系统各项指标等措施，改善了轧后板面清洁度。

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Thanks to the failure analysis of the hammers made of two different kinds of materials, it is certain that the cleanness of materials plays a great impact on the high-temperature corrosion.

对两种材料锤头失效的分析，确定了材料的洁净程度对高温腐蚀影响。

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