论文部分内容阅读
1911年,滑铁卢公司开始制造农业拖拉机。同年,公司邀请又一个发明人来表演他自己设计的拖拉机但田间性能不理想,经改进后田间性能仍不被接受。但他的拖
In 1911, Waterloo began manufacturing agricultural tractors. In the same year, the company invited another inventor to perform his own design of the tractor but the performance of the field was not satisfactory. After the improvement, the field performance was still not acceptable. But his drag