sealed area

基本解释

The workmen sealed this area off so they could do some construction.
工人已经把这个地段封锁起来，便于施工。
The aerator only made of three major parts of pottery aerator aerate screw and cap is simple in structure and of easy assembly. there is a very small sealed area.
结构简单、组装方便。整个曝气器仅由陶瓷曝气头、通气螺杆、螺帽三个主要部分组成，密封部位面积极小。
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。
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