n.可变高度表面充气器 surface aerator: 表面曝气机; 表面曝气器; 浮置式曝气机aerator of variable microporosity: 可变微孔曝头bdy ane surface aerator: 型(倒嫂叶轮曝气机ds type surface aerator: (侄嫂型表面曝气机pe ertical surface aerator: 型立式表面曝气机下载手机词典可随时随地查词查翻译