炮栓

例句：

1. 1. The soldiers had to use the gun to secure the entrance.
   士兵们不得不用枪来锁住入口。
2. 2. The gun was a crucial piece of equipment in the war.
   枪是战争中至关重要的装备。
3. 3. The gun was loaded with bullets and ready to fire.
   枪里装有子弹，随时准备射击。