“叶轮”造句

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 .