However , the noise spectrum of the ash exhauster always centers at low frequency range.排粉机噪声呈明显的低频特性.The utility model relates a linkage device of a cooking fume exhauster and a gas stove.一种燃气炉与抽油烟机的联动装置....
The measles is caused by a kind of specific epiphyte.麻疹是由一种特殊的真菌引起的.The strategy involved too douses ( two doses ) of measles vexing ( vaccine ) with supplements of vitamin A.提高麻疹 免疫 的策略还包括两种加有维他命A添加济的疫苗.The doctor told ...