在毛主席的革命路线指引下,上海铁路局上海工务工厂于1975年与铁道部科学研究院金化所协作,成立了以工人为主体的“道岔可控硅中频淬火”三结合试验小组。一年多来,在各级党组织的领导下,小组的同志仅用一个月的时间就完成了设备的安装和调试工作。经过反复试验,初步掌握了采用可控硅中频电源,感应加热,对 Under the guidance of Chairman Mao’s revolutionary line, the Shanghai Public Works Plant of Shanghai Railway Administration, in collaboration with Jinhua Institute of Science and Technology of the Ministry of Railways in 1975, set up a three-pronged test group of “turnout thyristor IF quenching” with workers as the main body. Over the past year and more, under the leadership of party organizations at all levels, comrades in the group have completed the installation and commissioning of equipment in only one month. After repeated tests, initially mastered the use of SCR intermediate frequency power supply, induction heating, right