carry-around oxygen cylinder

例句：

1. 1.We need to carry a carry-around oxygen cylinder with us at all times.
   我们需要随时携带手提氧气罐。
2. 2. The doctor gave her an oxygen cylinder to help her breathe.
   医生给她一个氧气罐来帮助她呼吸。
3. 3.He carried the heavy oxygen cylinder across the room.
   他提着沉重的氧气罐穿过房间。