... 外配流径向活塞泵 radial piston pump with exterior admission 弯管壳体泵 Elbow Casing Pump 往复泵 oscillating displacement pump ...
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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。
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