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The safe production in coal face is directly influenced by the low pressure sealing quality of hydraulic props.
单体液压支柱低压密封质量，直接影响到工作面安全生产。
The influences of dynamic pressure effect during the sealing face to be opening for vapor-liquid mixing phase sealing and full liquid phase sealing are discussed.
讨论了汽液两相密封和全液相密封端面开启过程的动压效应的影响；
The mechanism of sealing face operating failure under the action of dynamic pressure is proposed.
提出动压作用下密封端面开启失效机理；
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