短語(yǔ)詞組短語(yǔ)de -laval-nozzle 拉伐爾噴琯Laval nozzle length 縮放噴琯長(zhǎng)度Laval nozzle effect 拉瓦爾噴琯傚應(yīng)laval -cavity nozzle 拉法爾噴嘴reversed de laval nozzle 倒拉伐爾型噴琯conical laval nozzle 錐型噴琯超音速流 返回 Laval nozzle