The paper analyses the problems of existing flat gate valve used in dense-medium system pipeline and introduces anti-friction qualities and functions after improvement.
分析了重介质系统管路中平板闸阀存在的问题，介绍了改进后的耐磨特点和性能。
Discusses the existing problems of slime dense medium system in Xiqu coal mine preparation plant, points out the solved methods, provides experience for preparation plant improving.
探讨了西曲矿选煤厂煤泥重介系统存在的问题，提出了具体的解决办法，为选煤厂改造提供经验。
Discusses the existing problems of slime dense medium system in Xiqu coal mine preparation plant, points out the solved methods, provides experience for preparation plant improving.
探讨了西曲矿选煤厂煤泥重介系统存在的问题，提出了具体的解决办法，为选煤厂改造提供经验。
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