This is an all-purpose tractor.

这是辆万能拖拉机。

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Major changes in tractor design include the power takeoff, the all-purpose or tricycle-type tractor, which enabled farmers to cultivate planted crops mechanically;

拖拉机设计的主要改变包括有动力输出装置，以及多用式或三轮型拖拉机的出现，这使农户实现机械化培育作物；

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