pneumatique

例句：

1. 1. The balloon was sealed with a rubber band, ensuring it would not leak.
   这个气球用橡皮筋密封了，确保不会漏气。
2. 2. The airtight compartment kept the food fresh for hours.
   这个气密的隔间让食物保持新鲜几个小时。
3. 3.Gastight seals are used in industrial processes to prevent leaks.
   气密密封用于工业过程中以防止泄漏。