接触食物前尤其对洗手不能有半点马虎。Be particularly fastidious about washing your hands before touching food.问题之一是对机场员工的安检措施马虎松懈。One of the problem areas is lax security for airport personnel.对卫生与安全条例的马虎态度a lax attitude to health and safe...
The spilled liquid gasoline quickly evaporates, adding more HC pollution to the air.溅落的液态汽油迅速地蒸发, 给空气增添了更多的HC污染物.Traditional deferrization processing of EMM is oxidative deferrization by adding MnO _ 2 when leaching.电解金属...
叶轮可用角钢制成.The vanes are made of structural angle iron.这种装置的运转情况与叶轮泵很相似.This device operates similarly to the vane pump.叶轮有开式 、 半闭式和闭式三种, 如图 2-2 所示.Impeller are open, and closed three - Banbi, as shown in Figure 2 - 2 ....