虽然在建筑质量的坚固性和封堵的严密性上不及永久密闭，但在矿井通风中若无法满足运输及时间的要求时，临时密闭可发挥其自身的独特作用。
Although the airtight is not as solid and tight as permanent airtight, the temporary airtight will bring its unique use when mine ventilation cannot satisfy the time requirement.
密闭是煤矿井下一道非常重要的设施，及时准确地掌握密闭内各参数的变化对安全生产有着重要的意义。
Airtight structure is a very important facility in coal mines. It is of great significance to learn changes in parameters at sealed area timely and accurately for safety in production.
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