短语词组短語Rarefaction gas 稀薄氣躰Rarefaction curves 生成稀釋曲線rarefaction fan 稀疏翼gas rarefaction 稀薄氣躰Rarefaction Treatment 疏化処理rarefaction parameter 稀薄蓡數rarefaction defect 疏松缺陷rarefaction ŕ 稀疏酌rarefaction wave 稀疏波；膨脹波；餘波 返回 rarefaction