466厂是中船总系统生产柴油机配件的专业化工厂,气阀是该厂建厂时拟定的纲领性产品之一。但那时(70年代)只能生产极少的硅铬钢整材配件,而且,其使用性能差、寿命短。1984年底,该厂在接受了北京铁路局物 The 466 plant is a specialized plant for the production of diesel engine parts by the China National Shipbuilding General Assembly System. The gas valve is one of the programmatic products that will be developed when the plant is built. However, at that time (in the 1970s) only very few silicon-chromium steel parts were produced. Moreover, they had poor performance and short life. At the end of 1984, the plant was accepted by the Beijing Railway Bureau.