helmet

• And there ' s a free bucket helmet with every purchase
  而且每买一个还送免费的巴克头盔
• Specification for helmets used in recreational roller skating
  滚轴溜冰用头盔标准规范
• It is not safe to ride a bike without a helmet
  骑摩托车不戴安全帽很危险。
• All visitors to the site must wear safety helmet
  到工地的所有参观者必须带上安全帽。
• Bmx downhill helmet safety helmets skate helmet
  头盔，自行车头盔，体育用品，滑雪头盔
• I mean , i ' m the only person who wears a helmet to work
  我是唯一一个带着钢盔工作的人