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n.推進(jìn)者，葉輪( impeller的名詞復(fù)數(shù) )...

impellers的音標(biāo)：...

The impellers are kept in their proper relationship to each other by spur gear.液輪之間借助于正齒輪保持彼此正常的關(guān)系.Mainly by the impellers, pump body and pump cover composition.主要由葉輪 、 泵體和泵蓋組成.Welding is one of the important technologie...