water-sealing gas holder

例句：

1. 1.The water-sealing gas holder is used to prevent the leakage of oil during transportation.
   水封气瓶用于在运输过程中防止油的泄漏。
2. 2.The water-sealing gas holder was designed to ensure the safety of the equipment.
   水封气瓶的设计是为了确保设备的安全。
3. 3.The water-sealing gas holder is an essential tool for refueling ships.
   水封气瓶是船舶加油时必不可少的工具。