为提高氧乙炔切割的速度,许多单位对束放型(即拉瓦尔喷管型)快速切割嘴进行了大量的研究工作。为要将切割嘴的中心切割氧孔加工成这种线型,不外乎采用机械加工、电解铸造和镶不锈钢套等工艺方法。我厂于1973年研制成功一种不锈钢镶套的束放型快速切割嘴,经投入生产使用,取得了比较好的效 In order to increase the speed of oxyacetylene cutting, many units have done a lot of research on the beaming (ie, Laval nozzle type) rapid cutting nozzle. In order to cut the center of the mouth cutting oxygen hole processing into this line, nothing more than using mechanical processing, electrolytic casting and set stainless steel sleeve and other processes. I plant in 1973 successfully developed a stainless steel set of beam beam type fast cutting nozzle, put into production use, and achieved good results