在英明领袖华主席抓纲治国战略决策的指引下,一个为实现农业、工业、国防和科学技术现代化宏伟目标而奋斗的伟大群众运动,正在日益普及和深入,为适应工农业生产的飞速发展和进一步考核球铁焊接技术,我们在4160A 型柴油机曲轴的要害部位,人为制造了约40×40×30毫米的缺陷,焊补后进行了1000小时的耐久试验,获得了第一手感性认识,取到了良好的效果. Under the guidance of President Ying Ming Leader President Jiang Zemin’s strategic decision-making, a great people’s movement striving to achieve the grand goals of modernization in agriculture, industry, national defense, and science and technology is increasingly popularized and deepened to adapt to the rapid development of industrial and agricultural production. Further assessment of the ductile iron welding technology, we manually manufactured a defect of approximately 40×40×30 millimeters in the critical part of the 4160A diesel engine crankshaft, performed a durability test for 1,000 hours after welding repair, and obtained first-hand perceptual knowledge. To a good result.