英德
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百度
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维基
百科
矿井密闭
mine sealing
- 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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