介绍太西选煤厂将XJX T12型机械搅拌式浮选机改造为FJCR12 4型喷射式浮选机的过程，分析了这两类浮选机清水性能试验和生产试验的结果。
The process of conversion from XJX T12 mechanical flotation machine to FJCR12 4 jet flotation machine is introduced at Taixi Coal Preparation Plant.
最后对喷射式燃油加热器所用油嘴进行了不同供油量、不同喷油锥体形式和不同喷油锥角台架试验研究。
At the end, an experimental research is carried out on the oil injectors used for injector heater with different oil-supply, different forms of injection cone and different injection cone Angle.
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