拖拉机动力输出轴试验与发动机六工况试验差异的研讨

论述了拖拉机动力输出轴试验与发动机六工况试验的差异，分析了产生这一差异的原因，有利于发动机、拖拉机的设计和生产。

The difference of six-point test method is discussed between tractor PTO and engine,and the reason of the difference is analysed. This will benefit the design and production of tractor and engine.