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本文主要论述了冷激铸铁挺杆白口层质量对挺杆体使用寿命的影响，分析了影响冷激铸铁白口层质量因素，并提出了改进措施。
The paper mainly discusses the influence of the quality of the white layer of chilled cast iron tappet on the service life of the tappet body, analyzes the factors that affect the quality of the white cast iron of chilled cast iron, and puts forward the improvement measures.