It must be said that our testtractor was fresh off the stocks.
必须说，我们的试验拖拉机是新鲜的。
2
The results indicate that the established test system meet the requirement of engineering precision and can distinguish main tractor noise source effectively.
结果表明：所建立的测试系统可满足工程精度要求，能有效识别拖拉机主要噪声来源；
3
A new type of random program constant amplitude load spectrum is introduced, which is used in laboratory simulation test and life prediction of tractor components under random loading.