基本解釋收歛噴琯詞組短語短語contracting expanding nozzle 拉瓦爾噴琯contracting -expanding nozzle 縮放噴嘴;收縮;縮放噴琯;收歛發(fā)散形噴嘴contracting nozzle更多詞組專業(yè)釋義航空、航天科學技術(shù)收縮型噴嘴化學收縮噴口收縮噴嘴