“小角度纵波探伤法”是一种新的超声探伤方法。一九七六年五月,我厂为了在车轴检验中采用这种新方法,在工厂党委的领导下,由铁道部科学研究院金化所、工厂车轮车间、技术科组成了有工人、科技人员、领导干部参加的“三结合”小组。经过二十多天的反复验证,收到了良好的效果。现将试行情况简介如下: “三结合”小组全体同志,遵循毛主席关于“实践、认识、再实践、再认识”的教导, “Small angle longitudinal wave detection method” is a new method of ultrasonic flaw detection. In May, 1976, under the leadership of the factory party committee, our factory, in order to adopt this new method in inspection of axles, was composed of Jinhua Institute of Science and Technology, Factory Wheel Workshop and Technology Section of the Ministry of Railways, Personnel, leading cadres to participate in the “triple combination” group. After more than twenty days of repeated verification, received good results. The briefing on the trial implementation is as follows: All the “three combined” groups of comrades follow the teachings of Chairman Mao on “practice, understanding, re-practice and re-understanding”