Based on the theory of the phase transition, gas dynamics , this dissertation set up the mechanical model of high speed natural gas flow with phase transition in Laval nozzle.是什么意思_Based on the theory of the phase transition, gas dynamics , this dissertation set up the mechanical model of high speed natural gas flow with phase transition in Laval nozzle.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句