Pictured is a 1917 Case traction engine, which was the world's first tractor model.

图为1917年为例牵引引擎，这是世界上第一个拖拉机模型。

youdao

Pictured is a 1917 Case traction engine, which was the world's first tractor model.

图为1917年为例牵引引擎，这是世界上第一个拖拉机模型。

youdao