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 ....
Decadent be kind of mentation return kind of life condition?颓废是种心理状态还种生活状态?Sedi - mentation rate increases with resin grain increasing and temperature rising.树脂粒径越大,温度越高,沉降速度越快.The article presents the systems function, ...
用带子把滑水板绑在船顶后，我们就在多佛登上了气垫船。Strapping the skis on the roof, we boarded the hovercraft in Dover.彼得主动提出教他们滑水。Peter offered to teach them water-skiing.他主动提出教他们滑水。He offered to teach them water-skiing....