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对环形喷管的概念、特性、分类及其应用作了详细说明，介绍了国内外环形喷管的研究概况，并分析了环形喷管在实际应用中会遇到的问题及解决方法。
The concept, characteristics, classification and application of toroidal nozzle are described in detail. The research situation of toroidal nozzle at home and abroad is introduced, and the problems encountered in the practical application of toroidal nozzle are analyzed.