由模型分析可见，农机新度系数、大中型拖拉机的新旧结构比例是影响大中型拖拉机完好率的两大重要因素。
The analysis on models showed that newness coefficient of agricultural machinery, proportion of new and old tractors are two important factors affecting on the intact rate of large medium tractors.
由模型分析可见，农机新度系数、大中型拖拉机的新旧结构比例是影响大中型拖拉机完好率的两大重要因素。
The analysis on models showed that newness coefficient of agricultural machinery, proportion of new and old tractors are two important factors affecting on the intact rate of large medium tractors.
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