... blanked-off impeller 盲叶轮 close impeller 封闭式叶轮,闭合式叶轮 double channel impeller 双流道叶轮 ...
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The pump casing, impeller, motor housing and stationary base elbow shall be manufactured of close-grained cast iron, ASTM A48, Class 30.
泵壳，叶轮，电机壳和固定底座弯头都应该采用符合美国材料试验协会ASTM A48级别30致密铸铁制造。
Experimental results show that the trajectory of particles with large mass will be close to the pressure surface of blade in the centrifugal impeller.
试验结果表明：质量大的颗粒，在离心泵叶轮中，其轨迹总是趋向叶片压力面。
The MPT Series features close-coupled construction similar to the MP Series, but uses a regenerative turbine vane impeller.
该设备结构紧密，除了使用一款回热式透平推进器以外，与MP系列泵很相似。
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