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.
利用李雅谱诺夫直接方法分析了系统的稳定性，使系统应用的微喷射器表现了很好的机械性能。
Then we prove stability of this system in case of the normal operations by Liapunov's direct method, and apply the system to micro-injector actually for showing the effectiveness of the mechanism.
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