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；
The invention relates to a sealing method used between a low-pressure casting crucible and a workbench face and between the workbench face and a casting mould.
本发明涉及的是一种用于低压铸造坩埚和工作台面、工作台面与铸型之间的密封方法。
The sealing shear box is designed especially to meet the purpose that seepage water of high-pressure flows along appointed path of joint face during the test while no leakage will happen.
经特殊设计的渗流剪切盒可以保证节理在进行剪切渗流试验中，一定压力的渗流水会沿指定路径流过节理面，且不发生渗漏。
The sealing shear box is designed especially to meet the purpose that seepage water of high-pressure flows along appointed path of joint face during the test while no leakage will happen.
经特殊设计的渗流剪切盒可以保证节理在进行剪切渗流试验中，一定压力的渗流水会沿指定路径流过节理面，且不发生渗漏。
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