airtight seal的用法和樣例：
例句
- Therefore, in the use of the two hemispheres should be to maintain the smooth surface to ensure a good airtight effect.
因此，在使用時應保持兩個半球面的光潔，以確保良好的氣密效果。 - Absorb the quintessence of European and American energy-saving window technology with high airtight and watertight performance.
吸取歐美節能窗技術之精華，氣密水密性能較高。
