The test data of the key size of truck frame machining is processed and analyzed by the combing statistics to find the regularity of errors, determine the nature and category of the error and put forward the suggestions for improvement.%对转向架构架机加工的关键尺寸的检测数据运用梳理统计的方法进行处理和分析，发现误差出现的规律、判明误差的性质及类别，提出改进建议。
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