为了在一九八○年之前基本实现农业机械化,为普及大寨县而奋斗,涟源钢铁厂党委对上级下达的试制拖拉机急用钢种的任务非常重视,组织各有关车间、科室密切配合,认真对待、通过短短的两个多月的时间,克服了一切困难,基本完成了这一试制工作。共生产了符合部颁标准的钢材30吨,其中φ55毫米 In order to basically realize the mechanization of agriculture by 1980 and strive to popularize Dazhai County, the party committee of Lianyuan Iron and Steel Plant attaches great importance to the task of trial production of tractor urgently needed steel grades by superiors, and organizes the relevant workshops and departments to work closely and conscientiously After a short period of two months or more, all difficulties were overcome and the trial production was basically completed. A total of 30 tons of steel conforming to the ministerial standards were produced, of which φ55 mm