All impellers shall be statically and dynamically balanced .

所有叶轮应该具有静态和动态平衡性能。

Impellers in stainless steel are already available .

不锈钢的叶轮已经投入市场。

Determination of number of impellers in ammonia circulator under various work conditions .

不同工况下合成氨循环压缩机叶轮数的确定。

Flow and performance study on newly developed impellers for a left ventricular assist device .

新开发左心室辅助器叶轮之流场及性能研究。

The cable should be rationally set up and away from impellers , in order to avoid accident .

电缆线应合理架设，不得靠拢叶轮，以防发生事故。