The BOD test is essentially a bioassay procedure.BOD试验实际上是一项生物测定方法.The bioassay of freshwater sediment toxicity is described.描述了淡水沉积物毒性的生物测试方法.The field bioassay of 4 trunk injection insecticides ( 14 % Imidacloprid + DD...
如果你像我在生活中吃过同样多的苦头, 那么你就得做个豁达的人.If you've had as much trouble as I've had in my life, you need to be a bit of a philosopher.对这件事,豁达的邓肯一直怀恨在心.And so much rancour remained on the spirits of the gracious Duncan upo...
The flow of air through the fan is substantially parallel to the impeller axis.通过风机的气流基本上是与叶轮轴平行的.Impeller are open, and closed three - Banbi, as shown in Figure 2 - 2 .叶轮有开式 、 半闭式和闭式三种, 如图 2-2 所示.Impeller has single - a...