• 1. First stage impeller: 首级叶轮
• 2. First stage impeller retaining ring: 第一级叶轮挡圈
• 3. First stage impeller retaining collar: 第一级叶轮挡圈

• 1.A finite volume based software, FLUENT, to simulate the flow field in an inducer and the first stage impeller in the boiler feed pump under three different flow .
  但是，对诱导轮与首级叶轮之间的流动问题的深入探讨进行的不多。
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