diver's helmet

例句：

1. 1. He put on his diving helmet and dived into the water.
   他戴上潜水员头盔，跳入水中。
2. 2.The diver's helmet is designed to protect the wearer from the pressure of the water.
   潜水员头盔设计用来保护佩戴者免受水压的伤害。
3. 3.The divers were wearing their helmets when they entered the water.
   潜水员们进入水中时都戴着头盔。