bronze roller type impeller pump 青铜辊筒式推进泵
propeller-type impeller 桨式转轮 ; 螺旋桨式叶轮
enclosed type impeller [机] 闭式叶轮
marine-type impeller 船用式叶轮
semiclosed-type impeller 半开式叶轮
overhang type impeller 悬臂式叶轮
full open type impeller 全开型叶轮
Uses a new type impeller made of plastic or high-quality aluminum alloy, the former to the blade.
叶轮采用新型塑料或优质铝合金制成，前向式叶片。
Each reflecting hemisphere type impeller inducer drives a plurality of breeze generators to run for generating the electricity, and the output power and the electricity quantity are greatly increased.
各反射形半球风叶轮驱动多台微风发电机运行发电，输出功率和电量大大增加。
From the performance perspective, the type of impeller and the general efficiency closed impeller or less the same, but the type of impeller pump head curve dropped more.
从性能上讲，该型式叶轮效率高和普通闭式叶轮相差不大，但用该型式叶轮泵扬程曲线较为陡降。
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