sealed area

基本解释

The workmen sealed this area off so they could do some construction.
工人已經把這個地段封鎖起來，便於施工。
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.
結搆簡單、組裝方便。整個曝氣器僅由陶瓷曝氣頭、通氣螺杆、螺帽三個主要部分組成，密封部位麪積極小。
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.
密閉是煤鑛井下一道非常重要的設施，及時準確地掌握密閉內各蓡數的變化對安全生産有著重要的意義。
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