实践是检验真理的唯一标准。柴油机质量的好坏,只有在实际使用中才能全面考核出来。为此,我们规定每年组织两次下乡,进行用户调查访问,把操作技术传下去,把用户意见带回来,再把改进后的零件送到农村实地考核检验。这样几上几下,几个反复,才能使产品不断改进,质量逐步提高,使用寿命逐渐延长。我们厂生产的195型柴油机出厂后,对大部分地区还是适应的,但也有个别地 Practice is the only test of truth. Diesel quality is good or bad, only in actual use to fully assess it. To this end, we have stipulated that we should organize two trips to the countryside every year to conduct user surveys and visits, pass down operation techniques and bring user opinions back, and then send the improved parts to the rural field test. This few few times, a few repeated, in order to make continuous improvement of products, gradually improve the quality, service life gradually extended. Our factory production of 195 diesel engine after leaving the factory, still suitable for most areas, but also some