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 ....
The daughter of a railway engineer, she at first had a somewhat nomadic childhood.作为一个铁路工程师的女儿，她最初的童年生活有些漂泊不定。...the great nomadic tribes of the Western Sahara.西撒哈拉伟大的游牧部落Stop and talk with people who live a traditional ...
The treatment involves the placement of twenty-two electrodes in the inner ear.这一治疗需要在内耳放置22个电极。The electrodes are immersed in liquid.电极浸没在液体中。Every transistor has at least three electrodes.每个晶体管至少有三个电极....