The method was applied to analyze first tractor failure data.

并将该方法应用于拖拉机首次故障数据的分析。

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The method was applied to analyze first tractor failure data. Estimating reliability model parameters is the base to analyze reliability.

并将该方法应用于拖拉机首次故障数据的分析。

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Therefore, in order to solve the problem of the tractor noise, the exhaust noise, the engine ventilator noise and the noise of vibrating cover of the engine should be reduced first.

因此，解决该拖拉机噪声问题须首先降低排气噪声、发动机散热风扇噪声和发动机机罩振动噪声。

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They've been there since the 1930s, when the first tractor arrived.

CNN: Farmer faces planting season with seeds of distrust

Holt, whose great-grandfather invented the first track-type tractor (which led to the formation of Caterpillar), came to the rescue in 1996.

FORBES: Magazine Article

Holt, whose great-grandfather invented the first track-type tractor (which led to the formation of Caterpillar (nyse: CAT - news - people )), came to the rescue in 1996.

FORBES: It's How You Play the Game