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从多方面对三规格磨机筒本双层端盖全部发生裂纹的原因进行了全面分析。指出原设计行算理论的不足，提出了正确的计算方法。
From all aspects of the three-size mill barrel double-sided cover all the reasons for the crack occurred a comprehensive analysis. Pointed out the lack of original design theory, put forward the correct calculation method.