economical life of tractor
economical life of tractor
拖拉机经济寿命
以上为机器翻译结果,长、整句建议使用 人工翻译 。
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A good calculating model of tractor economical life is no use, if there is no real, reliable data.
一个再好的拖拉机经济寿命计算模型,如果没有真实、可靠的数据,也是枉然。
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As main power of agricultural production, tractor is renewed based on its economical life.
作为农业生产主要动力的拖拉机,其更新的关键依据就是经济寿命。
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