短語(yǔ)詞組短語(yǔ)natural -convection boi 大容積沸騰recirculation natural -convection 自然對(duì)流循環(huán)natural l convection 自然對(duì)流natural thermogravitational convection 自然對(duì)流natural heat convection 自然對(duì)粱熱;自然熱對(duì)流 返回 natural convection