2026-03-22 08:11 浏览次数 17
封闭区
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.
密闭是煤矿井下一道非常重要的设施,及时準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。