knuckle opener

例句：

1. 1.This knuckle opener is perfect for opening tight jars.
   这个关节打开器非常适合打开紧闭的罐子。
2. 2. The doctor gave him a knuckle opener to help him open his bottle of medicine.
   医生给了他一个关节打开器，帮助他打开他的药瓶。
3. 3. He used the knuckle opener to remove the cork from the wine bottle.
   他用关节打开器从葡萄酒瓶中取出软木塞。