建筑工人为了防护而带金属头盔。

The construction workers wore metal helmets for protection.

安全帽一种工人们在工业生产环境中戴的通常用金属或加强塑料制成的轻型保护头盔

A lightweight protective helmet, usually of metal or reinforced plastic, worn by workers in industrial settings.

头盔由坚硬材料如皮革、金属或塑料制成的头部覆盖物，由橄榄球队员、消防队员、建筑工人、摩托车骑手或其他人配戴，用以保护头部

A head covering of hard material, such as leather, metal, or plastic, worn by football players, firefighters, construction workers, motorcyclists, and others to protect the head.