辽宁铁牛滑坡的原因何在？谬机辽宁省进入９０年代以来，农业连年丰收，而‘铁牛连年滑坡’。据统计，近３年间，该省拖拉机拥有量减少了２．３７万台，下降幅度超过１５％，其中，大中型拖拉减少了卫．５９万台，下降２９．８％。不仅如此，在现有的拖拉机中，使用年限在... What are the reasons for Liaoning Tieniu Landslide? Since the arrival of Liaoning Province in the 1990s, agriculture has enjoyed bumper harvests year after year, and the “iron cattle have been declining year after year.” According to statistics, in the past three years, the number of tractors in the province has been reduced by 23,700 sets, a drop of more than 15%, of which, large and medium-sized tractors have reduced Wei. 59 million units, down 29.8%. Not only that, in existing tractors, the service life is...