多年以来，俄罗斯铁路工业一直在寻求开发新工艺和新材料以改善铁路车辆性能、保障安全并且降低维修成本。关注点之一就是自动车钩，该件在俄罗斯承受重载因而受到摩擦磨损，从而导致在使用中频繁修理。八十年代中期，运输部的合金工程中心发明了一种解决办法。这种修复和硬化? For many years, the Russian railway industry has been seeking to develop new processes and materials to improve the performance of railway vehicles, ensure safety and reduce maintenance costs. One of the concerns is the automatic coupler, which is subject to heavy loads in Russia and is subject to friction and wear, resulting in frequent repairs in service. In the mid-1980s, the alloy engineering center of the Ministry of Transport invented a solution. This repair and hardening?