1991年全国的旧柴油机节油改造技术推广工作,在前几年推广工作的基础上,又有了较大的进展,取得了突出的成绩。1991年全国有17个省改造旧柴油机24.36万台,超额完成计划改造任务的18%,其中改造 In 1991, the nationwide promotion of fuel-efficient retrofitting of old diesel engines was based on the promotion work carried out a few years earlier and made great progress and achieved outstanding results. In 1991, there were 243,600 old diesel engines retrofitted in 17 provinces across the country, exceeding the 18% of the planned reconstruction tasks, of which the transformation